Functional intermetallic compounds

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).

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)  

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)  

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, and B.Büchner
Cryst. Growth & Design, 13, 2707 (2013)  

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)    

   

Unconventional superconductors

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)

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)

Single crystal growth and physical properties of superconducting ferro-pnictidesBa(Fe,Co)2As2 grown using self-flux and Bridgman techniquesS. Aswartham, C. Nacke, G. Friemel, N. Leps, S. Wurmehl, N. Wizent, C. Hess, R. Klingeler, G. Behr, S. Singh, B. BüchnerJ. Cryst. Growth 314 341 (2011)  

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)  

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)  

NMR on ferromagnets

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)

NMR spectroscopy applied to Heusler thin films-a review (invited)
S. Wurmehl, J.T. Kohlhepp
Spin 4, 1440019 (2014)

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)  

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)  

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)