event photo with many people in the atrium of IFW


Name Wurmehl, Dr. Sabine
Abteilung IFF
Funktion Head of department "Synthesis and Crystal Growth"
Adresse IFW Dresden
Helmholtzstraße 20
01069 Dresden
Telefonnummer +49-351-4659-519
E-Mail s.wurmehl(at)ifw-dresden.de

Research interests (also see research webpage at IFF)

  •   Functional intermetallic materials
  •   Unconventional superconductors
  •   Frustrated magnets         
  •   Nuclear magnetic resonance spectroscopy to study ferromagnetic materials                                                                                                                                      

Curriculum Vitae

Academic career

since 2015:        Head of department "synthesis and crystal growth"

2013:                   Offer of a junior professorship (W1, tenure track W2), Universität zu Köln, Germany (declined)
2010-2015:        Emmy Noether research group leader at IFW Dresden
2009-2010:        Postdoctoral researcher, IFW Dresden, Germany
2007-2009:        Postdoctoral researcher, TU Eindhoven, The Netherlands, host: Prof. B. Koopmans
2002-2006:        PhD in chemistry, Johannes-Gutenberg-Universität Mainz, supervisor: C. Felser

Education

University of Mainz, Germany – chemistry (Dr., summa cum laude, 2006)
University of Mainz, Germany – chemistry (Diploma, 2002)  

Awards

2014 IFW research award
2012 IFF research award of the IFW Dresden
2010 Emmy-Noether fellowship of the DFG (IFW Dresden, Germany)
2007 Research fellowship of the DFG (Eindhoven, Netherlands)

List of publications

see all publications at Researcher ID  

2018

181) Suppression of the magnetic order in CeFeAsO: Nonequivalence of hydrostatic and in-plane chemical pressure

P. Materne, W. Bi, E. E. Alp, J. Zhao, M. Yu Hu, A. Jesche, C. Geibel, R. Kappenberger, S. Aswartham, S. Wurmehl, B. Büchner, D. Zhang, T. Goltz, J. Spehling, H.-H. Klauss

Phys. Rev. B 98, 014517 (2018)

180) Unraveling the Nature of Magnetism of the 5d4 Double Perovskite Ba2YIrO6

S. Fuchs, T. Dey, G. Aslan-Cansever, A. Maljuk, S. Wurmehl, B. Büchner,  V. Kataev

Phys. Rev. Lett. 120, 237204 (2018)

179) Static and dynamic magnetism of Ir-based double perovskites La2BIrO6 (B=Co, Zn) probed by magnetic resonance spectroscopies

M. Iakovleva, S. Fuchs, A. Alfonsov, H.-J. Grafe, M. Vogl, S.Wurmehl, T. Dey, B. Büchner, E. Vavilova,  V. Kataev

Phys. Rev. B (2018)

178) Crystal growth of off-stoichiometric Co2Cr1−xAl1+x Heusler compounds: Avoiding the solid state miscibility gap

A. Omar, F. Börrnert, M. Haft, S. Hampel, W. Löser, B. Büchner, S. Wurmehl

J. Cryst. Growth 498, 103 (2018)

177) Phase dynamics, structural, and magnetic properties of a Mn2.6Ga1-xSnx alloy series

D. Hettmann, W. Löser, C.G.F. Blum, S. Wurmehl

J. Alloys Cmpds. 748, 430 (2018)

176) Impact of concomitant Y and Mn substitution on superconductivity in La1−yYyFe1−xMnxAsO0.89F0.11

R. Kappenberger, F. Hammerath, P. Rousse, M. Asfaw Afrassa, M. H. Haghighi, S. Kamusella, G. Prando, G. Lamura,
A. U. B. Wolter, M. Moroni, S. Sanna, P. Carretta, C. Hess, H.-J. Grafe, H.-H. Klauss, S. Wurmehl, B. Büchner

Phys. Rev. B 97, 054522 (2018)

175) Increasing stripe-type fluctuations in AFe2As2 (A = K, Rb, Cs) superconductors probed by  75As NMR spectroscopy

Z. T. Zhang, D. Dmytriieva, S. Molatta, J. Wosnitza, S. Khim, S. Gass, A. U. B. Wolter, S. Wurmehl, H.-J. Grafe, and H. Kühne

Phys. Rev. B 97, 115110 (2018)

174) Observation of heavy spin-orbit excitons propagating in a nonmagnetic background: The case of A2YIrO6 (A = Ba, Sr)

M. Kusch, V. M. Katukuri, N. A. Bogdanov,  B. Büchner, T. Dey, D. Efremov, J. E. Hamann-Borrero, B. H. Kim, M. Krisch,
A. Maljuk, M. Moretti Sala, S. Wurmehl, G. Aslan-Cansever, M. Sturza, L. Hozoi, J. van den Brink, J. Geck

Phys. Rev. B 97, 064421 (2018)

173) Carbon nanotube-assisted synthesis of ferromagnetic Heusler nanoparticles of Fe3Ga

R. Ghunaim, V. Eckert, M. Scholz, M. Gellesch, S. Wurmehl, C. Damm, B. Büchner, M. Mertig, S. Hampel

J. Mater. Chem. C 6, 1255 (2018)

172)  Interplay of 3d- and 5d-sublattice magnetism in double-perovskite La2Zn1-xCoxIrO6

M. Vogl, L. T. Corredor, T. Dey, R. Morrow, F. Scaravaggi, A. U. B. Wolter, S. Aswartham, S. Wurmehl, and B. Büchner

Phys. Rev. B 97, 035155 (2018)

171) Inhomogeneities and superconductivity in poly-phase Fe-Se-Te systems

S. Hartwig, N. Schäfer, M. Schulze, S. Landsgesell, D. Abou-Ras, C.G.F. Blum, S. Wurmehl,  A. Sokolowski, B. Büchner,
K. Prokes

Physica B: Condens. Matter 531, 102 (2018)

170) Solid state single crystal growth of three-dimensional faceted LaFeAsO crystals

R. Kappenberger, S. Aswartham, F. Scaravaggi, C. G.F. Blum, M. I. Sturza, A.U.B. Wolter, S. Wurmehl, B. Büchner

J. Cryst. Growth 483, 9 (2018)

2017

169) Electrochemical Magnetization Switching and Energy Storage in Manganese Oxide filled Carbon Nanotubes

A. Ottmann, M. Scholz, M. Haft, E. Thauer, P. Schneider, M. Gellesch, C. Nowka, S. Wurmehl, S. Hampel, R. Klingeler

Scientific Reports 7, 13625 (2017)

168) Neutron diffraction study of the inverse spinels Co2TiO4 and Co2SnO4

S. Thota, M. Reehuis, A. Maljuk, A. Hoser, J.-U. Hoffmann, B. Weise, A. Waske, M. Krautz, D. C. Joshi, S. Nayak, S. Ghosh,
P. Suresh, K. Dasari, S. Wurmehl, O. Prokhnenko, and B. Büchner

Phys. Rev. B 96, 144104 (2017)

167) Unusual two-dimensional behavior of iron-based superconductors with low anisotropy

A. A. Kalenyuk, A. Pagliero, E. A. Borodianskyi, S. Aswartham, S. Wurmehl, B. Büchner, D. A. Chareev, A. A. Kordyuk,
V. M. Krasnov

Phys. Rev. B 96, 134512 (2017)

166) Compositional analysis of multi-element magnetic nanoparticles with a combined NMR and TEM approach

M. Gellesch, F. Hammerath, V. Suess, M. Haft, S. Hampel, S. Wurmehl, B. Büchner

J. Nanoparticle Research 19, 307 (2017)

165)Diluted paramagnetic impurities in nonmagnetic Ba2YIrO6

F. Hammerath, R. Sarkar, S. Kamusella, C. Baines, H.-H. Klauss, T. Dey, A. Maljuk, S. Gaß, A. U. B. Wolter, H.-J. Grafe,
S. Wurmehl, and B. Büchner

Phys. Rev. B 96, 165108 (2017)

164) High-energy electronic interaction in the 3d band of high-temperature iron-based superconductors

D. V. Evtushinsky, A. N. Yaresko, V. B. Zabolotnyy, J. Maletz, T. K. Kim, A. A. Kordyuk, M. S. Viazovska, M. Roslova, I. Morozov, R. Beck, S. Aswartham, L. Harnagea, S. Wurmehl, H. Berger, V. A. Rogalev, V. N. Strocov, T. Wolf, N. D. Zhigadlo, B. Büchner, and S. V. Borisenko

Phys. Rev. B 96, 060501(R) (2017)

163) Signatures of a magnetic field-induced unconventional nematic liquid in the frustrated and anisotropic spin-chain cuprate LiCuSbO4

H.-J. Grafe, S. Nishimoto, M. Iakovleva, E. Vavilova, L. Spillecke, A. Alfonsov, M.-I. Sturza, S. Wurmehl, H. Nojiri, H. Rosner,
J. Richter, U. K. Rößler, S.-L. Drechsler, V. Kataev, B. Büchner

Scientific Reports 7, 6720 (2017)

162) Experimental realization of type-II Weyl state in noncentrosymmetric TaIrTe4

E. Haubold, K. Koepernik, D. Efremov, S. Khim, A. Fedorov, Y. Kushnirenko, J. van den Brink, S. Wurmehl, B. Büchner,
T. K. Kim, M. Hoesch, K. Sumida, K. Taguchi, T. Yoshikawa, A. Kimura, T. Okuda, and S. V. Borisenko

Phys. Rev. B 95, 241108 (2017)

161) Experimental evidence for importance of Hund's exchange interaction for incoherence of charge carriers in iron-based superconductors        

J. Fink, E. D. L. Rienks, S. Thirupathaiah, J. Nayak, A. van Roekeghem, S. Biermann, T. Wolf, P. Adelmann, H. S. Jeevan,
P. Gegenwart, S. Wurmehl, C. Felser, and B. Büchner

Phys. Rev. B 95, 144513 (2017)

160) Iridium double perovskite Sr2YIrO6: A combined structural and specific heat study

L. T. Corredor, G. Aslan-Cansever, M. Sturza, Kaustuv Manna, A. Maljuk, S. Gass, T. Dey, A. U. B. Wolter, Olga Kataeva,
A. Zimmermann, M. Geyer, C. G. F. Blum, S. Wurmehl, and B. Büchner

Phys. Rev. B 95, 064418 (2017)

159) 3D oxalate-based coordination polymers: Relationship between structure, magnetism and color, studied by high-field ESR spectroscopy

D. Ziilic, K. Molcanov, M. Juric,  J. Habjanic, B. Rakvin, Y. Krupskaya, V. Kataev, S. Wurmehl, B. Büchner

Polyhedron, 126 120 (2017)

158) Electronic structure and ultrafast dynamics of FeAs-based superconductors by angle- and time-resolved photoemission spectroscopy

I. Avigo, S. Thirupathaiah, E. D. L. Rienks, L. Rettig, A. Charnukha, M. Ligges, R. Cortes, J. Nayak, H. S. Jeevan, T.Wolf, Y. Huang, S. Wurmehl, M. I. Sturza, P. Gegenwart, M. S. Golden, L.X.Yang, K. Rossnagel, M. Bauer, B. Büchner, M. Vojta, M. Wolf, C. Felser, J. Fink, U. Bovensiepen

Phys. Status Solidi B 254,1600382 (2017)

157) The role of spin-orbit coupling in the electronic structure of iron-based superconductors

S. Borisenko, D. Evtushinsky, Z. Liu, I. Morozov, R. Kappenberger, S. Wurmehl, B. Büchner,  A. Yaresko, T. Kim, M. Hoesch,
T. Wolf, N. Zhigadlo

Phys. Status Solidi B 254, 1600550 (2017)

156) A calorimetric investigation of RbFe2As2 single crystals

S. Khim, S. Aswartham, V. Grinenko, D. Efremov, C. G. F. Blum, F. Steckel, D. Gruner, A. U. B. Wolter, S.-L. Drechsler, C. Heß,
S. Wurmehl, B. Büchner

Phys. Status Solidi B 254, 1600208 (2017)

155) C-axis transport of pnictide superconductors

P. Müller, Y. Koval, I. Lazareva, C. Steiner, S. Wurmehl, B. Büchner, T. Stürzer, D. Johrendt

Phys. Status Solidi B 254, 1600157 (2017)

154) Defect states in LiFeAs as seen by low-temperature scanning tunneling microscopy and spectroscopy

R. Schlegel, P.K. Nag, D. Baumann, R. Beck, S. Wurmehl, B. Büchner, C. Hess

Phys. Status Solidi B 254, 1600159 (2017)

153) Spin reorientation transition in Na-doped BaFe2As2 studied by single-crystal neutron diffraction

F. Waßer, S. Wurmehl, S. Aswartham, Y. Sidis, J. T. Park, A. Schneidewind, B. Büchner, M. Braden

Phys. Status Solidi B 254, 1600181 (2017)

2016

152) Superconductivity in Ni-Doped Ba-Fe-As Thin Films Prepared From Single-Crystal Targets Using PLD

S. Richter, S. Aswartham, A. Pukenas, V. Grinenko, S. Wurmehl, W. Skrotzki, B. Büchner, K. Nielsch, and Ruben Hühne

IEEE Transact. Appl. Supercond. 27, 7300304 (2016)

151) Role of magnetic dopants in the phase diagram of Sm 1111 pnictides: The case of Mn

G. Lamura, T. Shiroka, S. Bordignon, S. Sanna, M. Moroni, R. De Renzi, P. Carretta, P. K. Biswas, F. Caglieris, M. Putti,
S. Wurmehl, S. J. Singh, J. Shimoyama, M. N. Gastiasoro, and B. M. Andersen

Phys. Rev. B 94, 214517 (2016)

150) Combined resistivity and Hall effect study on NaFe1-xRhxAs single crystals

F. Steckel, F. Caglieris, R. Beck, M. Roslova, D. Bombor, I. Morozov, S. Wurmehl, B. Büchner, and C. Hess

Phys. Rev. B 94, 184514 (2016)

149) Noncollinear antiferromagnetism of coupled spins and pseudospins in the double perovskite La2CuIrO6

K. Manna, R. Sarkar, S. Fuchs, Y. A. Onykiienko, A. K. Bera, G. Aslan Cansever, S. Kamusella, A. Maljuk, C. G. F. Blum,
L. T. Corredor, A. U. B. Wolter, S. M. Yusuf, M. Frontzek, L. Keller, M. Iakovleva, E. Vavilova, H.-J. Grafe, V. Kataev, H.-H. Klauss,
D. S. Inosov, S. Wurmehl, and B. Büchner

Phys. Rev. B 94, 144437 (2016)

148) Magnetotransport and de Haas-van Alphen measurements in the type-II Weyl semimetal TaIrTe4

S. Khim, K. Koepernik, D. V. Efremov, J. Klotz, T. Förster, J. Wosnitza, M. I. Sturza, S. Wurmehl, C. Hess, J. van den Brink, and B. Büchner

Phys. Rev. B 94, 165145 (2016)

147) Physical properties optimization of polycrystalline LiFeAs

S.J. Singh, U. Gräfe, R. Beck, A.U.B. Wolter, H.-J. Grafe, C. Hess, S. Wurmehl, B. Büchner

Physica C 529, 8 (2016)

146) Cantilever detected ferromagnetic resonance in thin Fe50Ni50, Co2FeAl0.5Si0.5 and Sr2FeMoO6 films using a double modulation technique

A. Alfonsov, E. Ohmichi, P. Leksin, A. Omar, H. Wang, S. Wurmehl, F. Yang, H. Ohta

J. Mag. Res. 270, 183 (2016)

145) Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2 Sr2MgOsO6

R. Morrow, A. E. Taylor, D. J. Singh, J. Xiong, S. Rodan, A. U. B. Wolter, S. Wurmehl, B. Büchner, M. B. Stone, A. I. Kolesnikov, Adam A. Aczel, A. D. Christianson, P. M. Woodward

Scientific Reports 6,  32462 (2016)

144) Single crystal growth of spin-ladder compound La8Cu7O19 by the travelling-solvent floating zone method

A. Mohan, S. Singh, S. Partzsch, M. Zwiebler, J. Geck, S. Wurmehl, B. Büchner, C. Hess

J. Cryst. Growth 448, 21 (2016)

143) Competing effects of Mn and Y doping on the low-energy excitations and phase diagram of La1-yYyFe1-xMnxAsO0.89F0.11 iron-based superconductors

M. Moroni, S. Sanna, G. Lamura, T. Shiroka, R. De Renzi, R. Kappenberger, M. A. Afrassa, S. Wurmehl, A. U. B. Wolter,
B. Büchner, and P. Carretta

Phys. Rev. B 94, 054508 (2016)

142) Spatial competition of the ground states in 1111 iron pnictides

G. Lang, L. Veyrat, U. Gräfe, F. Hammerath, D. Paar, G. Behr, S. Wurmehl, H.-J. Grafe

Phys. Rev. B 94, 014514 (2016)

141) Spin Dynamics and Ground State of the Frustrated Diamond Lattice Magnet CoAl2O4 as seen by 27Al NMR

M. F. Iakovleva, E. L. Vavilova, H.-J. Grafe, A. Maljuk, S. Wurmehl, B. Büchner, V. Kataev

Appl. Mag. Res. 47, 727 (2016)

140) Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2

K. Iida, V. Grinenko, F. Kurth, A. Ichinose, I. Tsukada, E. Ahrens, A. Pukenas, P. Chekhonin, W. Skrotzki, A. Teresiak, R. Hühne, S. Aswartham, S. Wurmehl, I. Mönch, M. Erbe, J. Hänisch, B. Holzapfel, S.-L. Drechsler,  D. V. Efremov

Scientific Reports 6,  28390 (2016)

139) Two distinct superconducting phases in LiFeAs

P. K. Nag, R. Schlegel, D. Baumann, H.-J. Grafe, R. Beck, S. Wurmehl, B. Büchner, C. Hess

Scientific Reports 6, 27926 (2016)

138) Unusual magnetotransport properties in a FeAs single crystal

S. Khim, M. Gillig, R. Klingeler, S. Wurmehl, B. Büchner, and C. Hess

Phys. Rev. B 93, 205129 (2016)

137)Tailored nanoparticles and wires of Sn, Ge and Pb inside carbon nanotubes

M. Haft, M. Grönke, M. Gellesch, S. Wurmehl, B. Büchner, M. Mertig, S. Hampel

Carbon 101, 352 (2016)

136) Acoustic signatures of the phases and phase transitions in Yb2Ti2O7

S. Bhattacharjee, S. Erfanifam, E. L. Green, M. Naumann, Z. Wang, S. Granovsky, M. Doerr, J. Wosnitza, A. A. Zvyagin,
R. Moessner, A. Maljuk, S. Wurmehl, B. Büchner, and S. Zherlitsyn

Phys. Rev. B 93, 144412 (2016)

135) Direct observation of spin-orbit coupling in iron-based superconductors

S. V. Borisenko, D. V. Evtushinsky,  Z.-H. Liu, I. Morozov, R. Kappenberger, S. Wurmehl, B. Büchner, A. N. Yaresko, T. K. Kim,
M. Hoesch, T. Wolf & N. D. Zhigadlo

Nature Physics 12, 311 (2016)

134)Weak-coupling superconductivity in a strongly correlated iron pnictide

A. Charnukha, K. W. Post, S. Thirupathaiah, D. Pröpper, S. Wurmehl, M. Roslova, I. Morozov, B. Büchner, A. N. Yaresko,
A. V. Boris, S. V. Borisenko & D. N. Basov

Scientific Reports 6, 18620 (2016)

133)Ba2YIrO6: A cubic double perovskite material with Ir5+ ions

T. Dey, A. Maljuk, D. V. Efremov, O. Kataeva, S. Gass, C. G. F. Blum, F. Steckel, D. Gruner, T. Ritschel, A. U. B. Wolter, J. Geck,
C. Hess, K. Koepernik, J. van den Brink, S. Wurmehl, and B. Büchner

Phys. Rev. B 93, 014434 (2016)

2015

132) Non-Fermi-liquid scattering rates and anomalous band dispersion in ferropnictides

J. Fink, A. Charnukha, E. D. L. Rienks, Z. H. Liu, S. Thirupathaiah, I. Avigo, F. Roth, H. S. Jeevan, P. Gegenwart, M. Roslova, I. Morozov, S. Wurmehl, U. Bovensiepen, S. Borisenko, M. Vojta, and B. Büchner

Phys. Rev. B 92, 201106(R) (2015)

131) Interface control by homoepitaxial growth in pulsed laser deposited iron chalcogenide thin films

S. Molatta, S. Haindl, S. Trommler, M. Schulze, S. Wurmehl, und R. Hühne

Scientific Reports 5, 16334 (2015)

130) Coexistence of superconductivity and magnetism in Ca1−xNaxFe2As2: Universal suppression of the magnetic order parameter in 122 iron pnictides

P. Materne, S. Kamusella, R. Sarkar, T. Goltz, J. Spehling, H. Maeter, L. Harnagea, S. Wurmehl, B. Büchner, H. Luetkens,
C. Timm, and H.-H. Klauss

Phys. Rev. B 92, 134511 (2015)

129)Structural Inhomogeneities in FeTe0.6Se0.4: Relation to Superconductivity

K. Prokes, M. Schulze, S. Hartwig, N. Schäfer, S. Landsgesell, C.G.F. Blum, D. Abou-Ras, M. Y. Hacisalihoglu, E. Ressouche,
B. Ouladdiaf,  B. Büchner  and  S. Wurmehl

J. Cryst. Growth 432, 95 (2015)

128) Enhancement of low-frequency fluctuations and superconductivity breakdown in Mn-doped La1−yYyFeAsO0.89F0.11 

F. Hammerath, M. Moroni, L. Bossoni, S. Sanna, R. Kappenberger, S. Wurmehl, A. U. B. Wolter, M. A. Afrassa, Y. Kobayashi,
M. Sato, B. Büchner, and P. Carretta

Phys. Rev. B 92, 020505(R) (2015)

127) NMR investigation of boron impurities in refined metallurgical grade Silicon

H. Grafe, W. Löser S. Schmitz, M. Sakaliyska, S. Wurmehl, S. Eisert, B. Reichenbach, J. Acker, A. Rietig, J. Ducke, and T. Müller

Phys. Stat. Solidi A  212, 2031 (2015)

126) Mutual Independence of Critical Temperature and Superfluid Density under Pressure
in Optimally Electron-Doped Superconducting LaFeAsO1−xFx

G. Prando, Th. Hartmann, W. Schottenhamel, Z. Guguchia, S. Sanna, F. Ahn, I. Nekrasov, C. G. F. Blum, A. U. B. Wolter,
S. Wurmehl, R. Khasanov, I. Eremin, and B. Büchner

Phys. Rev. Lett. 114, 247004 (2015)

125) Crystal growth and electronic phase diagram of 4d−doped Na1−δFe1−xRhxAs in comparison to 3d−doped Na1−δFe1−xCoxAs

F. Steckel, M. Roslova, R. Beck, I. Morozov, S. Aswartham, D. Evtushinsky, C. G. F. Blum, M. Abdel-Hafiez, D. Bombor,
J. Maletz, S. Borisenko, A. V. Shevelkov, A. U. B. Wolter, C. Hess, S. Wurmehl, and B. Büchner

Phys. Rev. B 91, 184516 (2015)

124)Ground state and low-energy magnetic dynamics in the frustrated magnet CoAl2O4 as revealed by local spin probes

M. Iakovleva, E. Vavilova, H.-J. Grafe, S. Zimmermann, A. Alfonsov, H. Luetkens, H.-H. Klauss, A. Maljuk, S. Wurmehl,
B. Büchner, and V. Kataev

Phys. Rev. B 91, 144419 (2015)

123) Impact of local order and stoichiometry on the ultrafast magnetization dynamics of Heusler compounds

D. Steil, O. Schmitt, R. Fetzer, T. Kubota, H. Naganuma, M. Oogane, Y. Ando, S. Rodan, C.G.F. Blum, B. Balke, S. Wurmehl,
M. Aeschlimann and M. Cinchetti

J. Phys. D: Appl. Phys. 48, 164016 (2015)

122) Spin reorientation in Ba0.65Na0.35Fe2As2 studied by single-crystal neutron diffraction

F. Waßer, A. Schneidewind, Y. Sidis, S. Wurmehl, S. Aswartham, B. Büchner, and M. Braden

Phys. Rev. B 91, 060505(R) (2015)

121)Flux growth and characterization of Sr2NiWO6 single crystals

C.G.F. Blum, A. Holcombe, M. Gellesch, M.I. Sturza, S. Rodan, R. Morrow, A. Maljuk, P. Woodward, P. Morris, A.U.B. Wolter,
B. Büchner, S. Wurmehl

J. Cryst. Growth 421, 39 (2015)

120)Local magnetism and structural properties of Heusler Ni2MnGa alloys

M. Belesi, L. Giebeler, C. G. F. Blum, U. K. Rößler, B. Büchner, and S. Wurmehl

Phys. Rev. B 91, 134415 (2015)

119) Characterization of doped Na(Fe1−xTx)As single crystals with T = Pd, Ni, Cr, and Mn

F. Steckel, R. Beck, M. Roslova,  M. Abdel-Hafiez, A. U. B. Wolter, I. Morozov, S. Wurmehl, C. Hess,  B. Büchner

J. Supercond. Nov. Magn. 28, 1123 (2015)

118) Nuclear magnetic resonance study of thin Co2FeAl0.5Si0.5 Heusler films with varying thickness

A. Alfonsov, B. Peters, F. Y. Yang, B. Büchner, and S. Wurmehl

Phys. Rev. B 91, 064421 (2015)

117) Granular behavior observed in the polycrystalline superconducting LiFeAs

S. J. Singh, R. Beck, S. Wurmehl, C. Hess, B. Büchner

Supercond. Sci. Technol. 28, 025006 (2015)

2014

116) NMR spectroscopy applied to Heusler thin films-a review (invited)

S. Wurmehl, J.T. Kohlhepp

Spin 4, 1440019 (2014)

115) Magnetic order and spin dynamics in La2O2Fe2OSe2 probed by 57Fe Mössbauer, 139La NMR, and muon-spin relaxation spectroscopy

M. Günther, S. Kamusella, R. Sarkar, T. Goltz, H. Luetkens, G. Pascua, S.-H. Do, K.-Y. Choi, H. D. Zhou, C. G. F. Blum,
S. Wurmehl, B. Büchner, and H.-H. Klauss

Phys. Rev. B 90, 184408 (2014)

114)Fine structure of the incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by INS

N. Qureshi, P. Steffens, D. Lamago, Y. Sidis, O. Sobolev, R. A. Ewings, L. Harnagea, S. Wurmehl, B. Büchner, and M. Braden

Phys. Rev. B 90, 144503 (2014)

113) Identical spin fluctuations in Cu- and Co-doped BaFe2As2 independent of electron doping

H.-J. Grafe, U. Gräfe, A. P. Dioguardi, N. J. Curro, S. Aswartham, S. Wurmehl, and B. Büchner

Phys. Rev. B 90, 0945519 (2014)

112) Spin density wave order and fluctuations in Mn3Si : A transport study

F. Steckel, S. Rodan, R. Hermann, C. G. F. Blum, S. Wurmehl, Bernd Büchner, and C. Hess

Phys. Rev. B 90, 134411 (2014)

111) Phonon anomalies, orbital-ordering and electronic raman scattering in Ca(Fe0.97Co0.03)2As2

P. Kumar, D.V.S. Muthu, L. Harnagea, S. Wurmehl, B. Büchner and A. K. Sood

J. Phys. Condend. Matter 26, 305403 (2014)

110) Superconducting properties of K1−xNaxFe2As2 under pressure

V. Grinenko, W. Schottenhamel, A. U. B. Wolter, D. V. Efremov, S.-L. Drechsler, S. Aswartham, M. Kumar, S. Wurmehl,
M. Roslova, I. V. Morozov, B. Holzapfel, B. Büchner, E. Ahrens, S. I. Troyanov, S. Köhler, E. Gati, S. Knöner, N. H. Hoang,
M. Lang, F. Ricci, and G. Profeta

Phys. Rev. B 90, 094511 (2014)

109) Electronic properties of Co2FeSi investigated by X-ray magnetic linear dichroism

M. Emmel,  A. Alfonsov, D. Legut, A. Kehlberger, E. Vilanova, I.P. Krug, D.M. Gottlob, M. Belesi, B. Büchner, M. Kläui,
P.M. Oppeneer, S. Wurmehl, H.J. Elmers, G. Jakob

J. Magn. Magn. Mater. 368, 364 (2014)

108)Josephson effect and Andreev reflection in Ba1–xNaxFe2As2 (x = 0.25 and 0.35) point contacts

V.V. Fisun, O.P. Balkashin, O.E. Kvitnitskaya, I.A. Korovkin, N.V. Gamayunova, S. Aswartham, S. Wurmehl, and Yu.G. Naidyuk

Low Temperature Physics 40, (2014)

107) Single 20 meV boson mode in KFe2As2 detected by point-contact spectroscopy

Yu. G. Naidyuk, O.E. Kvitnitskaya, N.V. Gamayunova, L. Boeri, S. Aswartham, S. Wurmehl, D.V. Efremov, G. Fuchs,
S.-L. Drechsler

Phys. Rev. B 90, 094505 (2014)

106) Low-temperature properties of single-crystal CrB2

A. Bauer, A. Regnat, C. G. F. Blum, S. Gottlieb-Schönmeyer, B. Pedersen, M. Meven, S. Wurmehl, J. Kunes,  and C. Pfleiderer

Phys. Rev. B 90, 064414 (2014)

105) Specific heat of Ca0.32Na0.68Fe2As2 single crystals: Unconventional s(+/-) multiband superconductivity with intermediate repulsive interband coupling and sizable attractive intraband couplings

S. Johnston, M. Abdel-Hafiez, L. Harnagea, V. Grinenko, D. Bombor, Y. Krupskaya, C. Hess, S. Wurmehl, A. U. B. Wolter,
B. Büchner, H. Rosner, and S.-L. Drechsler

Phys. Rev. B 89, 134507 (2014)

104)Growth of single crystalline delafossite LaCuO2 by the travelling-solvent floating zone method

A. Mohan, B. Büchner, S. Wurmehl, C. Hess

J. Cryst. Growth 402, 304 (2014)

103) Signatures of superconducting and pseudogap phases in ultrafast transient reflectivity of Ca(Fe0.927Co0.073)2As2

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner and A. K. Sood

EPL 105, 47004 (2014)

102) Specific heat of K0.71Na0.29Fe2As2 at very low temperatures

A. Reifenberger, M. Hempel, P. Vogt, S. Aswartham,  M. Abdel-Hafiez, V. Grinenko, S. Wurmehl, S.-L. Drechsler,
A. Fleischmann, C. Enss, R. Klingeler

J. Low. Temp. Phys. 175, 155 (2014)

101) Exploring point-contact spectra of Ba1-xNaxFe2As2 in the normal and superconducting states

Yu. G. Naidyuk, O. E. Kvitnitskaya, S. Aswartham, G. Fuchs, K. Nenkov, and S. Wurmehl

Phys. Rev. B 89, 104512 (2014)

100) Strong electron pairing at the iron 3dxz, yz orbitals in hole-doped BaFe2As2 superconductors revealed by ARPES

D. V. Evtushinsky, V. B. Zabolotnyy, T. K. Kim, A. A. Kordyuk, A. N. Yaresko, J. Maletz, S. Aswartham, S. Wurmehl, A. V. Boris,
D. L. Sun, C. T. Lin, B. Shen, H. H. Wen, A. Varykhalov, R. Follath, B. Büchner, and S. V. Borisenko

Phys. Rev. B 89, 064514  (2014)

99) Spin susceptibility in superconducting LiFeAs studied by polarized neutron diffraction

J. Brand, A. Stunault, S. Wurmehl, L. Harnagea, B. Büchner, M. Meven, and M. Braden

Phys. Rev. B 89, 045141 (2014)

98) Superconducting specific-heat jump  for K1xNaxFe2As2

V. Grinenko, D. V. Efremov, S.-L. Drechsler, S. Aswartham, D. Gruner, M. Roslova, I. Morozov, K. Nenkov, S. Wurmehl,
A. U. B. Wolter, B. Holzapfel, and B. Büchner

Phys. Rev. B 89, 060504(R) (2014)

97) Effect of annealing on spinodally decomposed Co2CrAl grown via floating zone technique

A. Omar, C.G.F. Blum, W. Löser, B. Büchner, S. Wurmehl

J. Cryst. Growth 401, 617 (2014)

96) Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO4 single crystal

K. Wang, A. Maljuk, C.G.F. Blum, T. Kolb, C. Jähne, C. Neef, H.-J. Grafe, L. Giebeler, H. Wadepohl, H.-P. Meyer, S. Wurmehl,
R. Klingeler

J. Cryst. Growth 386, 16 (2014)

2013

95) Independent Ordering of Two Interpenetrating Magnetic Sublattices in the Double Perovskite Sr2CoOsO6

R. Morrow , R. Mishra , O. D. Restrepo , M. R. Ball , W. Windl, S. Wurmehl, U. Stockert, B. Büchner, and P. M. Woodward

J. Am. Chem. Soc. 135, 18824 (2013)

94) de Haas-van Alphen effect and Fermi surface properties of single-crystal CrB2

M. Brasse, L. Chioncel, J. Kuneš, A. Bauer, A. Regnat, C. G. F. Blum, S. Wurmehl, C. Pfleiderer, M. A. Wilde, and D. Grundler

Phys. Rev. B 88, 155138 (2013)

93) Diversity of Microstructural Phenomena in Superconducting and Non-superconducting RbxFe2–ySe2: A Transmission Electron Microscopy Study at the Atomic Scale

M. V. Roslova, O. I. Lebedev, I. V. Morozov, S. Aswartham, S. Wurmehl, B. Büchner, and A. V. Shevelkov

Inorg. Chem 52, 14419 (2013)

92) Evidence for a vortex-glass transition in superconducting Ba(Fe0.9Co0.1)2As2

G. Prando, R. Giraud, S. Aswartham, O. Vakaliuk, M. Abdel-Hafiez, C. Hess, S. Wurmehl, A. U. B. Wolter, and B. Büchner

J. Phys.: Condens. Matter 25, 505701 (2013)

91) Flux dynamics and avalanches in the 122 pnictide superconductor Ba0.65Na0.35Fe2As2

A. K Pramanik, S. Aswartham, A. U. B. Wolter, S. Wurmehl, V. Kataev and B. Büchner

J. Phys.: Condens. Matter 25, 495701 (2013)

90)Epitaxial films of Heusler compound Co2FeAl0.5Si0.5 with high crystalline quality grown by off-axis sputtering

B. Peters, A. Alfonsov, C. G. F. Blum, S. J. Hageman, P. M. Woodward, S. Wurmehl, B. Büchner, and F. Y. Yang

Appl. Phys. Lett. 103, 162404 (2013)

89) 55Mn NMR study of quaternary half-metallic ferromagnetic Co2Mn1−xFexSi Heusler compounds

S. Wurmehl, A. Alfonsov, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, M. Wojcik, B. Balke, V. Ksenofontov, C. G. F. Blum, and B. Büchner

Phys. Rev. B 88, 134424 (2013)

88) Peculiarities of anisotropic electrical resistivity in Lu2PdSi3 single crystals

C. Cao, C. G. F. Blum, T. Ritschel, S. Rodan, L. Giebeler, D. Bombor, S. Wurmehl, W. Löser

Cryst. Eng. Comm. 15, 9052 (2013)

87)Progressive slowing down of spin fluctuations in underdoped LaFeAsO1−xFx

F. Hammerath, U. Gräfe, T. Kühne, H. Kühne, P. L. Kuhns, A. P. Reyes, G. Lang, S. Wurmehl, B. Büchner, P. Carretta, H.-J. Grafe

Phys. Rev. B 88, 104503 (2013)

86)Local structure and hyperfine interactions of 57Fe in NaFeAs studied by Mössbauer spectroscopy

I. Presniakov, I. Morozov, A. Sobolev, M. Roslova, A. Boltalin, V. Son, O. Volkova, A. Vasiliev, S. Wurmehl and B. Büchner

J. Phys.: Condens. Matter 25, 346003 (2013)

85) On the half-metallicity of Co2FeSi Heusler alloy: Point-contact Andreev reflection spectroscopy and ab initio study

L. Makinistian, M. M. Faiz, R. P. Panguluri, B. Balke, S. Wurmehl, C. Felser, E. A. Albanesi, A. G. Petukhov, and B. Nadgorny

Phys. Rev. B 87, 220402(R) (2013)

84) Phase dynamics and growth of Co2Cr1−xFexAl Heusler compounds: A key to understand their anomalous physical properties

A. Omar, M. Dimitrakopoulou, C. G. F. Blum, H. Wendrock, S. Rodan, S. Hampel, W. Löser, B. Büchner, and S. Wurmehl

Cryst. Growth & Design 13, 3925 (2013)

83) Facile Nanotube-Assisted Synthesis of Ternary Intermetallic Nanocrystals of the Ferromagnetic Heusler Phase Co2FeGa

M. Gellesch, M. Dimitrakopoulou, M. Scholz, C. G.F. Blum, M. Schulze, J. van den Brink, S. Hampel, S. Wurmehl, B.Büchner

Cryst. Growth & Design, 13, 2707 (2013)

82) NMR study of the impact of annealing on structural evolution of epitaxial Co2MnSi Heusler films

S. Rodan, A. Alfonsov, M. E. Belesi, F. Ferraro, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, Y. Sakuraba, S. Bosu,
K. Takanashi, B. Büchner, S. Wurmehl,

Appl. Phys. Lett. 102, 242404 (2013)

81) Evidence of d-wave superconductivity in K1-xNaxFe2As2 (x=0,0.1) single crystals from low-temperature specific-heat measurements

M. Abdel-Hafiez, V. Grinenko, S. Aswartham, I. Morozov, M. Roslova, O. Vakaliuk, S. Johnston, D. V. Efremov,
J. van den Brink, H. Rosner, M. Kumar, C. Hess, S. Wurmehl, A. U. B. Wolter, B. Büchner, E. L. Green, J. Wosnitza, P. Vogt,
A. Reifenberger, C. Enss, M. Hempel, R. Klingeler, and S.-L. Drechsler

Phys. Rev. B 87, 180507(R) (2013)

80) Role of in-plane and out-of-plane dilution in CeFeAsO: Charge doping versus disorder

G. Prando, O. Vakaliuk, S. Sanna, G. Lamura, T. Shiroka, P. Bonfà, P. Carretta, R. De Renzi, H.-H. Klauss, C. G. F. Blum,
S. Wurmehl, C. Hess, and B. Büchner

Phys. Rev. B 87, 174519 (2013)

79)Observation of charge accumulation and onsite Coulomb repulsion at transition metal impurities in the iron pnictides

R. Kraus, V. Bisogni, L. Harnagea, S. Aswartham, S. Wurmehl, G. Levy, I. S. Elfimov, B. Büchner, G. A. Sawatzky, and J. Geck

Phys. Rev. B 87, 134516 (2013)

78)Gap-Dependent Quasiparticle Dynamics and Coherent Acoustic Phonons in CaFe2As2 across SDW Phase Transition

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner, and A. K. Sood

J. Phys. Soc. Jpn. 82, 044715 (2013)

77)Anomalous superconducting state in LiFeAs implied by the As-75 Knight shift measurement

S.-H. Baek, L. Harnagea, S. Wurmehl, B. Büchner and H.-J. Grafe

J. Phys.: Condens. Matter 25, 162204 (2013)

76) Microwave absorption study of pinning regimes in Ba(Fe1-xCox)2As2 single crystals

Y. Talanov, N. Beisengulov, G. Kornilov, T. Shaposhnikova, E. Vavilova, C. Nacke, S. Wurmehl, N. Panarina, C. Hess, V. Kataev and B. Büchner

Supercond. Sci. Technol. 26, 045015 (2013)

75)Intrinsic pinning and the critical current scaling of clean epitaxial Fe(Se, Te) thin films

K. Iida, J. Hänisch, E. Reich, F. Kurth, R. Hühne, L. Schultz, B. Holzapfel, M.Hanawa, I. Tsukada, M. Schulze, S. Aswartham,
S. Wurmehl and B. Büchner

Phys. Rev. B 87, 104510 (2013)

74) Electronic band structure and momentum dependence of the superconducting gap in Ca1-xNaxFe2As2 from angle-resolved photoemission spectroscopy

D. V. Evtushinsky, V. B. Zabolotnyy, L. Harnagea, A. N. Yaresko, S. Thirupathaiah, A. A. Kordyuk, J. Maletz, S. Aswartham,
S. Wurmehl, E. Rienks, R. Follath, B. Büchner, and S. V. Borisenko

Phys. Rev. B 87, 094501 (2013)

73) Disordered magnetism in superconducting KFe2As2 single crystals

V. Grinenko, S.-L. Drechsler, M. Abdel-Hafiez, S. Aswartham, A. U. B. Wolter, S. Wurmehl, C. Hess, K. Nenkov, G. Fuchs,
D. V. Efremov, B. Holzapfel, J. van den Brink, B. Büchner

Physica status solidi (b) 250, 593 (2013)

72) Half-Metallic ferromagnetism with unexpectedly small spin splitting in the Heusler compound Co2FeSi

D. Bombor, C. G. F. Blum, O. Volkonskiy, S. Rodan, S. Wurmehl, C. Hess, and B. Büchner

Phys. Rev. Lett. 110, 066601 (2013)

71) Single crystal growth of antiferromagnetic Mn3Si by a two-phase RF floating-zone method

R. Hermann, H. Wendrock, S. Rodan, U.K. Rößler, C.G.F. Blum, S. Wurmehl, B. Büchner

J. Cryst. Growth 363, 1 (2013)

70) Interband Quasiparticle Scattering in Superconducting LiFeAs Reconciles Photoemission and Tunneling Measurements

C. Hess, S. Sykora, T. Hänke, R. Schlegel, D. Baumann, V. B. Zabolotnyy, L. Harnagea, S. Wurmehl, J. van den Brink, and
B. Büchner

Phys. Rev. Lett. 110, 017006 (2013)

2012

69) Investigation of LiFeAs by means of "break-junction" technique

S. A. Kuzmichev, T. E. Shanygina, I. V. Morozov, A. I. Boltalin, M. V. Roslova, S. Wurmehl, B. Büchner

JETP Letters 95, 537 (2012)

68) Acoustic and optical phonon dynamics from femtosecond time-resolved optical spectroscopy of the superconducting iron pnictide Ca(Fe0.944Co0.056)2As2

S. Kumar, L. Harnagea, S. Wurmehl, B. Büchner and A. K. Sood

EPL 100, 57007 (2012)

67) Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As revealed by ARPES

S. Thirupathaiah, D. V. Evtushinsky, J. Maletz, V. B. Zabolotnyy, A. A. Kordyuk, T. K. Kim, S. Wurmehl, M. Roslova, I. Morozov, B. Büchner, and S. V. Borisenko

Phys. Rev. B 86, 214508 (2012)

66) Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs

J. Knolle, V. B. Zabolotnyy, I. Eremin, S. V. Borisenko, N. Qureshi, M. Braden, D. V. Evtushinsky, T. K. Kim, A. A. Kordyuk,
S. Sykora, Ch. Hess, I. V. Morozov, S. Wurmehl, R. Moessner, and B. Büchner

Phys. Rev. B 86, 174519 (2012)

65) Pr magnetism and its interplay with the Fe spin-density wave in PrFeAsO1-xFx (x=0,0.15)

U. Stockert, N. Leps, L. Wang, G. Behr, S. Wurmehl, B. Büchner, and R. Klingeler

Phys. Rev. B 86, 144407 (2012)

64) Probing the Role of Co Substitution in the Electronic Structure of Iron Pnictides

G. Levy, R. Sutarto, D. Chevrier, T. Regier, R. Blyth, J. Geck, S. Wurmehl, L. Harnagea, H. Wadati, T. Mizokawa, I. S. Elfimov,
A. Damascelli, and G. A. Sawatzky

Phys. Rev. Lett. 109, 077001 (2012)

63) Local magnetic anisotropy in BaFe2As2: A polarized inelastic neutron scattering study

N. Qureshi, P. Steffens, S. Wurmehl, S. Aswartham, B. Büchner, and M. Braden

Phys. Rev. B 86, 060410(R) (2012)

62) Probing the unconventional superconducting state of LiFeAs by quasiparticle interference

T. Hänke, S. Sykora, R. Schlegel, D. Baumann, L. Harnagea, S. Wurmehl, M. Daghofer, B. Büchner, J. van den Brink, C. Hess

Phys. Rev. Lett. 108, 127001 (2012)

61) Specific heat and upper critical fields in KFe2As2 single crystals

M. Abdel-Hafiez, S. Aswartham, S. Wurmehl, V. Grinenko, C. Hess, S.-L. Drechsler, S. Johnston, A.U.B. Wolter, B. Büchner,
H. Rosner, L. Boeri

Phys. Rev. B  85, 134533 (2012)

60) Gd3+ electron spin resonance spectroscopy on LaO1-xF xFeAs superconductors

A. Alfonsov, F. Muranyi, N. Leps, R. Klingeler, A. Kondrat, C. Hess, S. Wurmehl, A. Koefiler, G. Behr, V. Kataev, B. Büchner

J. Ex. Theo. Phys. 114, 662 (2012)

59) 75As NMR-NQR study in superconducting LiFeAs

S.-H. Baek, H.-J. Grafe, F. Hammerath, M. Fuchs, C. Rudisch, L. Harnagea, S. Aswartham, S. Wurmehl, J. van den Brink,
B. Büchner

Europ. Phys. J. B 85, 159 (2012)

58) ac susceptibility investigation of vortex dynamics in nearly optimally doped RFeAsO1-xFx superconductors (R = La, Ce, Sm)

G. Prando, P. Carretta, R. De Renzi, S. Sanna, H.-J. Grafe, S. Wurmehl, B. Büchner

Phys. Rev. B 85, 14452 (2012)

57) Inelastic neutron-scattering measurements of incommensurate magnetic excitations on superconducting LiFeAs single crystals

N. Qureshi, P. Steffens, Y. Drees, A.C. Komarek, D. Lamago, Y. Sidis, L. Harnagea, H.-J. Grafe, S. Wurmehl, B. Büchner,
M. Braden

Phys. Rev. Lett. 108, 117001 (2012)

56) Hole doping in BaFe2As2: The case of Ba1-xNaxFe2As2 single crystals

S. Aswartham, M. Abdel-Hafiez, D. Bombor, M. Kumar, A.U.B. Wolter, C. Hess, D.V. Evtushinsky, V.B. Zabolotnyy,
A.A. Kordyuk, T.K. Kim, S.V. Borisenko, G. Behr, B. Büchner, S. Wurmehl

Phys. Rev. B 85, 22452 (2012)

55) Collapsed tetragonal phase in Ca(Fe1-xCox)2As2 stabilized by pressure: Structural studies using single-crystal neutron diffraction

K. Prokeš, B. Ouladdiaf, L. Harnagea, S. Wurmehl, D. N. Argyriou, and B. Büchner

Phys. Rev. B 85, 104523 (2012)

54) 59Co nuclear magnetic resonance study of the local distribution of atoms in the Heusler compound Co2FeAl0.5Si0.5

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, and B. Koopmans

J. Appl. Phys. 111, 043903 (2012)

2011

53) Effect of Co substitution on the magnetic order in Ca(Fe1-xCox)2As2 single crystals studied by neutron diffraction

K. Prokeš, S. Mat’aš, L. Harnagea, S. Singh, S. Wurmehl, D. N. Argyriou, and B. Büchner

Phys. Rev. B 83, 104414 (2011)

52) Local formation of a Heusler structure in CoFeAl alloys

S. Wurmehl, P.J. Jacobs, J.T. Kohlhepp, H.J.M. Swagten, B. Koopmans, S. Maat, M.J. Carey, and J.R. Childress

Appl. Phys. Lett. 98, 12506 (2011)

51) Single crystal growth and physical properties of superconducting ferro-pnictides Ba(Fe,Co)2As2 grown using self-flux and Bridgman techniques

S. Aswartham, C. Nacke, G. Friemel, N. Leps, S. Wurmehl, N. Wizent, C. Hess, R. Klingeler, G. Behr, S. Singh, B. Büchner

J. Cryst. Growth 314, 341 (2011)

50) High-field electron spin resonance spectroscopy study of GdFeAsO1-xFx superconductors

A. Alfonsov, F. Muranyi, V. Kataev, G. Lang, N. Leps, L. Wang, R. Klingeler, A. Kondrat, C. Hess, S. Wurmehl, A. Koehler,
G. Behr, S. Hampel, M. Deutschmann, S. Katrych, N.D. Zhigadlo, Z. Bukowski, J. Karpinski, B. Büchner

Phys. Rev. B 83, 94526 (2011)

49) Phase diagram of the iron arsenide superconductors Ca(Fe1-xCox)2As2

L. Harnagea, S. Singh, G. Friemel, N. Leps, D. Bombor, M. Abdel-Hafiez, A.U.B. Wolter, C. Hess, R. Klingeler, G. Behr,
S. Wurmehl, B. Büchner

Phys. Rev. B 83, 94523 (2011)

48) Raman evidence for the superconducting gap and spin-phonon coupling in the superconductor Ca(Fe0.95Co0.05)2As2

P. Kumar, A. Bera, D.V.S. Muthu, A. Kumar, U.V. Waghmare, L. Harnagea, C. Hess, S. Wurmehl, S. Singh, B. Büchner, A.K. Sood

J. Phys. Condens. Matter 23, 255403 (2011)

47) Specific heat and angle-resolved photoemission spectroscopy study of the superconducting gaps in LiFeAs

U. Stockert, M. Abdel-Hafiez, D.V. Evtushinsky, V.B. Zabolotnyy, A.U.B. Wolter, S. Wurmehl, I. Morozov, R. Klingeler,
S.V. Borisenko, B. Büchner

Phys. Rev. B 83, 224512 (2011)

46) Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering

O. Heyer, T. Lorenz, V.B. Zabolotnyy, D.V. Evtushinsky, S.V. Borisenko, I. Morozov, L. Harnagea, S. Wurmehl, C. Hess,
B. Büchner

Phys. Rev. B 84, 64512 (2011)

45) Multigap superconductivity in single crystals of Ba0.65Na0.35Fe2As2: A calorimetric investigation

A.K. Pramanik, M. Abdel-Hafiez, S. Aswartham, A.U.B. Wolter, S. Wurmehl, V. Kataev, B. Büchner

Phys. Rev. B 84, 64525 (2011)

44) Suppressed superconductivity in charge-doped Li(Fe1-xCox)As single crystals

S. Aswartham, G. Behr, L. Harnagea, D. Bombor, A. Bachmann, I.V. Morozov, V.B. Zabolotnyy, A.A. Kordyuk, T.K. Kim,
D.V. Evtushinsky, S.V. Borisenko, A.U.B. Wolter, C. Hess, S. Wurmehl, B. Büchner

Phys. Rev. B 84, 54534 (2011)

43) Fishtail effect and vortex dynamics in LiFeAs single crystals

A.K. Pramanik, L. Harnagea, C. Nacke, A.U.B. Wolter, S. Wurmehl, V. Kataev, B. Büchner

Phys. Rev. B 83, 94502  (2011)

42) As vacancies, local moments, and Pauli limiting in LaFeAs1-dO0.9F0.1 superconductors

V. Grinenko, K. Kikoin, S.-L. Drechsler, G. Fuchs, K. Nenkov, S. Wurmehl, F. Hammerath, G. Lang, H.-J. Grafe, B. Holzapfel,
J. Brink, B. Büchner,  L. Schultz

Phys. Rev. B 84, 134516 (2011)

41) Pseudogap-like phase in Ca(Fe1-xCox)2As2 revealed by 75As NQR

S.-H. Baek, H.-J. Grafe, L. Harnagea, S. Singh, S. Wurmehl, B. Büchner

Phys. Rev. B 84, 94510 (2011)

40) Transport and thermal properties of single- and polycrystalline NiZr(0.5)Hf(0.5)Sn

S. Ouardi, G.H. Fecher, C. Felser, C.G.F. Blum, D. Bombor, C. Hess, S. Wurmehl, B. Büchner, E. Ikenaga

Appl. Phys. Lett. 99, 152112 (2011)

39) Exploring the details of the martensite-austenite phase transition of the shape memory Heusler compound Mn2NiGa by hard x-ray photoelectron spectroscopy, magnetic and transport measurements

C.G.F. Blum, S. Ouardi, G.H. Fecher, B. Balke, X. Kozina, G. Stryganyuk, S. Ueda, K. Kobayashi, C. Felser, S. Wurmehl,
B. Büchner

Appl. Phys. Lett. 98, 252501 (2011)

38) Generic Fe buffer layers for Fe-based superconductors: Epitaxial FeSe1-xTex thin films

K. Iida, J. Haenisch, M. Schulze, S. Aswartham, S. Wurmehl, B. Büchner, L. Schultz, B. Holzapfel

Appl. Phys. Lett. 99, 202503 (2011)

2010

37) Weak Superconducting Pairing and a Single Isotropic Energy Gap in Stoichiometric LiFeAs

D. S. Inosov, J. S. White, D.V. Evtushinsky, I.V. Morozov, A. Cameron, U. Stockert, V. B. Zabolotnyy, T. K. Kim, A. A. Kordyuk, S.V. Borisenko,  E. M. Forgan, R. Klingeler, J. T. Park, S. Wurmehl, A. N. Vasiliev, G. Behr, C. D. Dewhurst, and V. Hinkov

Phys. Rev. Lett. 104, 187001 (2010)

36) Pinning effects in ceramic SmO1-xFxFeAs as revealed by microwave absorption

N.Y. Panarina, Y.I. Talanov, T.S. Shaposhnikova, N.R. Beysengulov, E. Vavilova, G. Behr, A. Kondrat, C. Hess, N. Leps,
S. Wurmehl, R. Klingeler, V. Kataev, B. Büchner

Phys. Rev. B 81, 224509 (2010)

35) Critical current and vortex dynamics in single crystals of Ca(Fe1-xCox)2As2

A.K. Pramanik, L. Harnagea, S. Singh, S. Aswartham, G. Behr, S. Wurmehl, C. Hess, R. Klingeler, B. Büchner

Phys. Rev. B 82, 14503 (2010)

34) Crystal and magnetic structure of the oxypnictide superconductor LaFeAsO1-xFx: A neutron-diffraction study

N. Qureshi, Y. Drees, J. Werner, S. Wurmehl, C. Hess, R. Klingeler, B. Büchner, M. T. Fernández-Díaz, and M. Braden

Phys. Rev. B 82, 184521 (2010)

33) Single crystal growth and characterization of superconducting LiFeAs

I. Morozov, A. Boltalin, O. Volkova, A. Vasiliev, O. Kataeva, U. Stockert, M. Abdel-Hafiez, D. Bombor, A. Bachmann,
L. Harnagea, M. Fuchs, H.-J. Grafe, G. Behr, R. Klingeler, S. Borisenko, C. Hess, S. Wurmehl, B. Büchner

Cryst. Growth and Design 10, 4429 (2010)

32) Hyperfine magnetic field on iron atoms and Co-Fe disordering in Co2FeSi

V. Ksenofontov, M. Wójcik, S. Wurmehl, H. Schneider, B. Balke, G. Jakob, and C. Felser

J. Appl. Phys. 107, 09B106 (2010)

31) Local antiferromagnetic correlations in the iron pnictide superconductors LaFeAsO1−xFx and Ca(Fe1−xCox)2As2 as seen via normal-state susceptibility

R. Klingeler, N. Leps, I. Hellmann, A. Popa, U. Stockert, C. Hess, V. Kataev, H.-J. Grafe, F. Hammerath, G. Lang, S. Wurmehl,
G. Behr, L. Harnagea, S. Singh, and B. Büchner

Phys. Rev. B 81, 024506 (2010)

2009

30) Highly ordered, half-metallic Co2FeSi single crystals

C. G. F. Blum, C. A. Jenkins, J. Barth, C. Felser, S. Wurmehl, G. Friemel, C. Hess, G. Behr, B. Büchner, A. Reller, S. Riegg,
J. T. Kohlhepp, H. J. H. Swagten

Appl. Phys. Lett. 95, 161903 (2009)

29) Off-stoichiometry in Co2FeSi thin films sputtered from stoichiometric targets revealed by nuclear magnetic resonance    

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, C. G. F. Blum, V. Ksenofontov, H. Schneider, G. Jakob, D. Ebke, G. Reiss

J. Phys. D: Appl. Phys. 42, 084017 (2009)

2008

28) Topical review: Nuclear magnetic resonance studies of materials for spintronic applications

S. Wurmehl, J. T. Kohlhepp

J. Phys. D: Appl. Phys. 41, 173002 (2008)

27) Rational design of new materials for spintronics: Co2FeZ (Z = Al, Ga, Si, Ge)

B. Balke, S. Wurmehl, G. H. Fecher, C. Felser, J. Kübler

Sci. Technol. Adv. Mater. 9, 014102 (2008)

26) Hyperfine field distribution in the Heusler compound Co2FeAl probed by 59Co NMR

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans

J. Phys. D: Appl. Phys. 41, 115007 (2008)

25) Effects of random distribution in Co2Mn1−xFexSi compounds probed by 55Mn NMR

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, M. Wójcik , B. Balke, C. G. F. Blum, V. Ksenofontov, G. H. Fecher, C. Felser

J. Appl. Phys. 103, 07D706 (2008)

2007

24) Probing the random distribution of half-metallic Co2Mn1−xFexSi Heusler alloys

S. Wurmehl, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans, M. Wójcik , B. Balke, C. G. F. Blum, V. Ksenofontov, G. H. Fecher, C. Felser

Appl. Phys. Lett. 91, 052506 (2007)

23) Structural, magnetic and transport properties of Co2FeSi Heusler films

H. Schneider, C. Herbort, G. Jakob, H. Adrian, S. Wurmehl, C. Felser

J. Phys. D: Appl. Phys. 40, 2613 (2007)

22) Bulk sensitive photoemission spectroscopy of Heusler compounds

G. H. Fecher, S. Wurmehl,  B. Balke, K. Kobayashi, Y. Takeda, Y. Saitoh, H. A. Dürr,  F. Kronast, C. Felser

J. Electron Spectroscopy and Related Phenomena 156-158 XXXVI (2007)

21) Structural characterization of the Co2FeZ (Z=Al, Si, Ga, and Ge) Heusler compounds by x-ray diffraction and extended x-ray absorption fine structure spectroscopy

B. Balke, S. Wurmehl, G. H. Fecher, C. Felser, M. C. M. Alves, F. Bernardi, J. Morais

Appl. Phys. Lett. 90, 172501 (2007)

20) Structural properties of the quaternary Heusler alloy Co2Cr1-xFexAl

S. Wurmehl, M. C. M. Alves, J. Morais, V. Ksenofontov, S. R. Teixeira, G. Machado, G. H. Fecher, C. Felser

J. Phys. D: Appl. Phys. 40, 1524 (2007)

19) Structural, magnetic and transport properties of Co2FeSi Heusler films

H. Schneider, Ch. Herbort, G. Jakob, M. Jourdan, H. Adrian, S. Wurmehl, C. Felser

J. Phys. D: Appl. Phys. 40, 1548  (2007)

2006

18) Epitaxial film growth and magnetic moments of Co2FeSi

H. Schneider, G. Jakob, M. Kallmayer, H.-J. Elmers, M. Cinchetti, S. Wurmehl, C. Felser, M. Aeschlimann, H. Adrian

Phys. Rev. B 74, 174426 (2006)

17) Structure and properties of the CoMnSb in the context of  half-metallic ferromagnetism

V. Ksenofontov, G. Melnyk, M. Wojcik, S. Wurmehl, K. Kroth, S. Reiman, P. Blaha, C. Felser

Phys. Rev. B 74, 134426 (2006)

16) Powder Magnetoresistance of Co2Cr0.6Fe0.4Al /Al2O3 Powder Compacts

T. Block, S. Wurmehl, J. Windeln, C. Felser

Appl. Phys. Lett. 88, 202504 (2006)

15) Structural Properties of the Quaternary Heusler Compound Co2Cr1-xFexAl

S. Wurmehl, J. Morais, M. C. M. Alves, S. R. Teixeira, G. H. Fecher, C. Felser

J. Alloys and Comp. 423, 159 (2006)

14) Co2CrIn: A Further Magnetic Heusler Compound

S. Wurmehl, G. H. Fecher, C. Felser

Z. Naturforsch. B 61B, 749 (2006)

13) Valence electron rules for prediction of half-metallic compensated-ferrimagnetic behaviour of Heusler compounds with complete spin polarisation

S. Wurmehl, H. C. Kandpal, G. H. Fecher, C. Felser

J. Phys.: Condens. Matter. 18, 6171 (2006)

12) Slater-Pauling Rule and Curie-Temperature of Co2 Based Heusler Compounds

G. H. Fecher, H. C. Kandpal, S. Wurmehl, G. Schönhense, C. Felser

J. Appl. Phys. 99, 08J106 (2006)

11) Half-metallic Ferromagnetism with High Magnetic Moment and High Curie Temperature in Co2FeSi

S. Wurmehl, G. H. Fecher, V. Ksenofontov, F. Casper, U. Stumm, H.-J. Lin, Y. Hwu, C. Felser

J. Appl. Phys. 99, 08J103 (2006)

10) Electronic Structure and Spectroscopy of the Quaternary Heusler Alloy Co2Cr1-xFexAl

S. Wurmehl, G. H. Fecher, K. Kroth, F. Kronast, H. A. Dürr, Y. Takeda, Y. Saitoh, K. Kobayashi, H.-J. Lin, G. Schönhense

J. Phys. D: Appl. Phys. 39, 803 (2006)

9) Magnetic Properties of Co2Mn1-xFexSi Heusler Alloys

M. Kallmayer, H. J. Elmers, B. Balke, S. Wurmehl, F. Emmerling, G. H. Fecher, C. Felser

J. Phys. D: Appl. Phys. 39, 786 (2006)

8) Investigation of Co2FeSi: The Heusler Compound with Highest Curie Temperature and Magnetic Moment

S. Wurmehl, G. H. Fecher, H. C. Kandpal, V. Ksenofontov, H.-J. Lin, C. Felser

Appl. Phys. Lett. 88, 032503 (2006)

2005

7) Design of Magnetic Materials. Part I: The Electronic Structure of the Ordered, Doped Heusler Compound Co2Cr1-xFexAl

G. H. Fecher, H. C. Kandpal, S. Wurmehl, C. Felser, G. Schönhense

J. Phys.: Condens. Matter. 17, 7237 (2005)

6) Geometric, Electronic, and Magnetic Structure of Co2FeSi

S. Wurmehl, G. H. Fecher, H. C. Kandpal, V. Ksenofontov, H. J. Lin, J. Morais, C. Felser

Phys. Rev. B 72, 184434 (2005)

2004

5) Field Dependence of Orbital Magnetic Moments in the Heusler Compounds Co2FeAl and Co2Cr0.6Fe0.4Al

H. J. Elmers, S. Wurmehl, G. H. Fecher, G. Jakob, C. Felser, G. Schönhense

Appl. Phys. A 79, 557 (2004)

4) Enhanced Orbital Magnetic Moments in the Heusler Compounds Co2CrAl, Co2Cr0.6Fe0.4Al and Co2FeAl

H. J. Elmers, S. Wurmehl, G. H. Fecher, G. Jakob, C. Felser, G. Schönhense

J. Magn. Magn. Mater. 272-276, 758 (2004)

2003

2) Investigation of a Novel Material for Magnetoelectronics: Co2Cr0.6Fe0.4Al

C. Felser, B. Heitkamp, F. Kronast, D. Schmitz, S. Cramm, H. A. Dürr, H. J. Elmers, G. H. Fecher, S. Wurmehl, T. Block,
D. Valdaitsev, S. A. Nepijko, A. Gloskovskii, G. Jakob, G. Schönhense, W. Eberhardt

J. Phys.: Condens. Matter. 15, 7019 (2003)

1) Element Specific Magnetic Moments from Core-absorption MCD of the Doped Heusler Alloy Co2Cr0.6Fe0.4Al

H. J. Elmers, G. Fecher, D. Valdaitsev, S. Nepijko, A. Gloskowskij, G. Jakob, G. Schönhense, S. Wurmehl, T. Block, C. Felser,
P.-C. Hsu, W.-L. Tsai, S. Cramm

Phys. Rev. B 67, 104412 (2003)