event photo with many people in the atrium of IFW

PD PhD Björn Martin Valldor

Position:Project leader
Address:IFW Dresden
Helmholtzstraße 20
01069 Dresden
Telephone number:


Office:D EG 11


Curriculum Vitae

Project LeaderJan.2018 - Dec.2020Solid State Research, IFW e.V., Dresden

Senior Researcher

Dec.2016 - Dec. 2017Solid State Research, IFW e.V., Dresden
Priv. Doz.3 June 2015

Chemistry Department, Technical University of Dresden

Authorization to teach at TU-Dresden (Umhabilitation, Lehrbefugnis)

Research Group LeaderMar. 2013 - Oct. 2016Physics of Correlated Matter, CPfS-MPI Dresden
Priv. Doz.6 May 2010

Inorganic Chemistry Department, University of Cologne

Habilitation title:"Exploring new homologues of Swedenborgite - compositions and properties."

Post Doc.Sept. 2006 - Feb. 2013II. Physics Department, University of Cologne
Post Doc.Apr. 2005 - Aug. 2006Solid State Physics Department, Technical University Braunschweig
Post Doc.July 2002 - Sept. 2004Inorganic Chemistry Department, Münster University
PhD10 Sept. 1999 - 9 Nov. 2001

Inorganic Chemistry Department, Stockholm University

Doctor thesis title: "Preparation, structure, and properties of Hg,Tl-containing high-temperature superconductors"

M.Sc.(Fil.Lic.)Jan. 1997 - 10 Sept. 1999Inorganic Chemistry Department, Stockholm University
B. Sc.(Fil.Cand.)Aug. 1993 - Jan. 1996Inorganic Chemistry Department, Stockholm University
Chem. Eng.Aug. 1989 - May 1993Åsö Gymnasium, Stockholm

Publication record (from recent to past)


ORCID number: 0000-0001-7061-3492


  • Wang G., Valldor M., Dorn K. V., Wilk-Kozubek M., Smetana V., Mudring A-V.
    Ionothermal Synthesis Enables Access to 3D Open Framework Manganese Phosphates Containing Extra-large 18-Ring Channels.
    ACS Chem. Mater. (2019) accepted for publication
  • Valldor M., Morrow R.
    Bichalcogenide Model Systems for Magnetic Chains with Variable Spin Sizes and Optional Crystallographic Inversion Symmetry.
    (invited) Inorg. Chem. (2019) accepted for publication
  • Grönke M., Pohflepp D., Schmidt P., Valldor M., Oswald S., Wolf D., Hao Q., Steiner U., Büchner B., Hampel S.
    Simulation and synthesis of α-MoCl3 nanosheets on substrates by short time chemical vapor transport.
    Nano Str. Nano Obj. 19 (2019) 100324
  • Grönke M., Arrozi U. S. F., Bronkalla N., Schmidt P., Valldor M., Oswald S., Woodcock T. G., Eckert V., Hao Q., Plüschke L., Lederer A., Nielsch K., Büchner B., Kaskel S., Hampel S.
    Layered α-TiCl3: Microsheets on YSZ Substrates for Ethylene Polymerization with Enhanced Activity.
    ACS Chem. Mater. 14 (2019) 5305-5313


  • Mikhailova D., Giebeler L., Maletti S., Oswald S., Sarapoluva A., Indris S., Hu Z., Bednarcik J.,  Valldor M.
    Operando studies of antiperovskite lithium battery cathode material (Li2Fe)SO
    ACS Appl. Energy Mater. 1 (2018) 6593-6599
  • Lai K. T., Antonyshyn I., Prots Yu.,  Valldor M.
    Extended chemical flexibility of cubic anti-perovskite lithium battery cathode materials
    Inorg. Chem. 57 (2018) 13296-13299
  • Grönke M., Schmidt P., Valldor M., Oswald S., Wolf D., Lubk A., Büchner B., Hampel S.
    Chemical vapor growth and delamination of a-RuCl3 nanosheets down to the monolayer limit
    Nanoscale 10 (2018) 19014-19022
  • Valldor M., Mikhailova D., Giebeler L., Lai K.T., Spillecke L., Grafe H.-J., Büchner B.
    Synthesis, Characterization, and Electrochemistry of Layered Chalcogenides LiCuCh (Ch = Se, Te).
    Inorg. Chem. 57 (2018) 7201-7207
  • Reim J., Rosén E., Zaharko O., Mostovoy M., Robert J., Valldor M., Schweika W.
    Neutron diffraction study and theoretical analysis of the antiferromagnetic order and the diffuse scattering in the layered kagome system CaBaCo2Fe2O7
    Phys. Rev. B 97 (2018) 144402
  • Qureshi N., Fernández-Díaz M. T., Chapon, L. C., Senyshyn A., Schweika W., Valldor M.
    Magnetic structure of the swedenborgite CaBa(Co3Fe)O7 derived by unpolarized neutron diffraction and spherical neutron polarimetry
    Phys. Rev. B 97 (2018) 064404
  • Siribbal S. M., Schläfer J., Ilyas S., Hu Z.-J., Uvdal K., Valldor M., Mathur S.
    Air-Stable Gadolinium Precursors for the Facile Microwave-Assisted Synthesis of Gd2O3 Nanocontrast Agents for Magnetic Resonance Imaging
    Crystal Growth and Design 18 (2018) 633-641



  • Lai K.T., Adler P., Prots Yu., Hu Z., Kuo C.-Y., Pi T.-W., Valldor M.
    Successive Phase Transitions in Fe2+ Ladder Compounds Sr2Fe3Ch2O3 (Ch = S, Se)
    Inorg. Chem. 56 (2017) 12606-12614
  • Valldor M., Yadav R., Hozoi L., van den Brink J., Maljuk A., Werner J., Scaravaggi F., Wolter A.U.B., Büchner B.
    Swedenborgite CaBa(Mn2Fe2)O7 with spin ordering on a geometrically frustrated, polar, non-centrosymmetric S = 5/2 lattice.
    Z. Anorg. Allg. Chem. 643 (2017) 1543-1550
  • Iakovleva M., Zimmermann S., Zeisner J., Alfonsov A., Grafe H.-J., Valldor M., Vavilova E., Büchner B., Kataev V.
    Magnetic resonance spectroscopy on the spin-frustrated magnets YBaCo3MO7 (M = Al, Fe)
    Phys. Rev. B 96 (2017) 064417
  • Guo H., Fernández-Díaz M. T., Komarek A. K., Huh S., Adler P., Valldor M.
    Long-range anti-ferromagnetic order on spin ladders SrFe2S2O and SrFe2Se2O, as probed by neutron diffraction and Mössbauer spectroscopy
    Eur. J. Inorg. Chem. 32 (2017) 3829-3833
  • Krest A., Sandleben A., Valldor M., Werker M., Ruschewitz U., Klein A.
    Heteroleptic Complexes of the Tridentate Pyridine-2,6-di-tetrazolate Ligand
    ChemistrySelect 2 (2017) 5849-5859
  • Lai K. T., Antonyshyn I., Prots Yu., Valldor M.
    Anti-Perovskite Li-Battery Cathode Materials
    J. Am. Chem. Soc. 139 (2017) 9645-9649
  • Kim J., Lai K. T., Valldor M.
    Magnetism on quasi-1-D lattices in novel non-centrosymmetric Ba3CrVS4O3 and in centrosymmetric La3TMWS3O6 (TM = Cr, Fe, Co)
    J. Magn. Magn. Mater. 435 (2017) 126-135
  • Lai K. T., Komarek A. C., Fernández-Díaz M. T., Chang P. S., Huh S., Rosner H., Kuo C. Y., Hu Z., Pi T. W., Adler P., Ksenofontov V., Tjeng L. H., Valldor M.
    Canted antiferromagnetism on rectangular layers of Fe2+ in polymorphic CaFeSeO
    Inorg. Chem. 56 (2017) 4271-4279
  • Nemrava S., Vinnik D. A., Hu Z., Valldor M., Kuo C. Y., Zherebtsov D. A., Gudkova S. A., Chen C. T., Tjeng L. H., Niewa R.
    Three Oxidation States of Mn in the Barium Hexaferrite BaFe12–xMnxO19
    Inorg. Chem. 56 (2017) 3861-3866
  • Lai K. T., Valldor M.
    Coexistence of spin ordering on ladders and spin dimer formation in a new-structure-type compound Sr2Co3S2O3
    Sci. Rep. 7 (2017) 43767
  • Liu W., Lai K. T., Eckhardt K., Prots Yu., Burkhardt U., Valldor M.
    Synthesis and characterization of sulfide oxide SrZnSO with strongly polar crystal structure
    J. Solid State Chem. 246 (2017) 225-229




  • Scharffe S., Breunig O., Cho V., Laschitzky P., Valldor M., Welter J. F., Lorenz T.
    Suppression of Pauling´s residual entropy in the dilute spin ice (Dy1-xYx)Ti2O7
    Phys. Rev. B 92 (2015) 180405(R)
  • Müller C. J., Bushlya V., Ghasemi M., Lidin S., Valldor M., Wang F.
    Ternary intermetallic compounds in Au-Sn soldering systems- structure and properties
    J. Mater. Sci. 50 (2015) 7808-7820
  • Gerhards H., Krest A., Eulgem P. J., Naumann D., Rokitta D., Valldor M., Klein A.
    Syntheses and Coordination Chemistry of Perfluoroaryl-1H-Tetrazoles
    Polyhedron 100 (2015) 271-287
  • Valldor M., Rößler U.K., Prots Yu., Kuo C.-Y., Chiang J.-C., Hu Z., Kniep R., Tjeng L.H.
    Synthesis and Characterization of Ba[CoSO]: magnetic Complexity in the Presence of Chalcogen Ordering
    Chem. Eur. J.  21 (2015) 10821-10828
  • Huh S., Prots Yu., Adler P., Tjeng L.H., Valldor M.
    Synthesis and Characterization of frustrated Spin-Ladders SrFe2S2O and SrFe2Se2O
    Eur. J. Inorg. Chem. 2015 (2015) 2982-2988
  • Qureshi N., Valldor M., Weber L., Senyshyn A., Sidis Y., Braden M.
    Magnetic spin-flop transition and interlayer spin-wave dispersion in PrCaFeO4 revealed by neutron diffraction and inelastic neutron scattering
    Phys. Rev. B.  91 (2015) 224402
  • Hopkins E.J., Prots Yu., Burkhardt U., Watier Y., Hu Z., Kuo C.-Y., Chiang J.-C., Pi T.-W., Tanaka A., Tjeng L.H., Valldor M.
    Ba3V2S4O3: A Mott Insulating Frustrated Quasi One-Dimensional S = 1 Magnet
    Chem. Eur. J.  21 (2015) 7938-7943
  • Scharffe S., Kolland G., Valldor M., Cho V., Welter J.F., Lorenz T.
    Heat Transport of the Spin-Ice Materials Ho2Ti2O7 and Dy2Ti2O7
    J. Magn. Magn. Mater.  383 (2015) 83-87
  • Xiao L., Mertens M., Wortmann L., Kremer S., Valldor M., Lammers T., Kiessling F., Mathur S.
    Enhanced In Vitro and In Vivo Cellular Imaging with Green Tea Coated Water-Soluble Iron Oxide Nanocrystals
    ACS. Appl. Mater. Interf.  7 (2015) 6530-6540



  • Valldor M., Adler P., Prots Yu., Burkhardt U., Tjeng L.H.
    S=2 Spin Ladders in the Sulfide Oxide BaFe2S2O
    Eur. J. Inorg. Chem. 36 (2014) 6150-6155 (cover page)
  • Reim J.D., Rosén E., Schweika W., Meven M., Leo N.R., Meier D., Fiebig M., Schmidt M., Kuo C.-Y., Pi T.-W., Hu Z., Valldor M.
    Structural invariance upon antiferromagnetic Ordering in geometrically frustrated Swedenborgite, CaBaCo2Fe2O7
    J. Appl. Cryst.  47 (2014) 2038-2047
  • Wortmann L., Ilyas S., Niznansky D., Valldor M., Arroub K., Berger N., Rahme K., Holmes J., Mathur S.
    Bioconjugated Iron Oxide Nanocubes: Synthesis, Functionalization, and Vectorization
    ACS Appl. Mater. Interf.  6 (2014) 16631-16642
  • Niesen S.K., Breunig O., Salm S., Seher M.,Valldor M., Warzanowski P., Lorenz T.
    Substitution effects on the Temperature versus magnetic Field Phase Diagrams of the quasi-one-dimensional effective Ising Spin-1/2 Chain System BaCo2V2O8
    Phys. Rev.  B 90 (2014) 104419
  • Wang G.M., Valldor M., Mallick B., Mudring A.-V.
    lonothermal synthesis of Open-Framework Metal Phosphates with a Kagome Lattice Network exhibiting canted Anti-ferromagnetism
    J. Mater. Chem.  C 2 (2014) 7417-7427
  • Grams Ch.P., Valldor M., Garst M., Hemberger J.
    Critical speeding-up in the magnetoelectric response of spin-ice near its monopole liquid-gas transition
    Nature Comm.  5 (2014) 4853
  • Fornalczyk G., Valldor M., Mathur S.
    Monomeric Iron Heteroarylalkenolates: Structural Design Concepts and Investigations on Their Application in Chemical Vapor Deposition
    Cryst. Gr. Des.  14 (2014) 1811-1818
  • Mettenbörger A., Singh T., Singh A.P., Järvi T.T., Moseler M., Valldor M., Mathur S.
    Plasma-chemical reduction of iron oxide photoanodes for efficient solar hydrogen production
    Int. J. Hydr. Energy  39 (2014) 4828-4835
  • Wang G.M., Valldor M., Spielberg E.T., Mudring A.-V.
    Ionothermal Synthesis, Crystal Structure, and Magnetic Study of Co2PO4OH Isostructural with Caminite
    Inorg. Chem.  53 (2014) 3072-3077
  • Lehnen T., Valldor M., Niznansky D., Mathur S.
    Hydrothermally grown porous FeVO4 nanorods and their integration as active material in gas-sensing devices
    J. Mater. Chem.  A 2 (2014) 1862-1868
  • Chen J.M., Chin Y.Y., Valldor M., Hu Z., Lee J.M., Haw S.C., Hiraoka N., Ishii H., Pao C.W., Tsuei K.D., Lee J.F., Lin H.J., Jang L.Y., Tanaka A., Chen C.T., Tjeng L.H.
    A Complete High-to-Low spin state Transition of Trivalent Cobalt Ion in Octahedral Symmetry in SrCo0.5Ru0.5O3-δ
    J. Am. Chem. Soc.  136 (2014) 1514-1519



  • Kolland G., Breunig O., Valldor M., Hiertz M., Frielingsdorf J., Lorenz T.
    Thermal conductivity and specific heat of the spin-ice compound Dy2Ti2O7: Experimental evidence for monopole heat transport
    Phys. Rev.  B 86 (2012) 060402
  • Wang G., Valldor M., Lorbeer C., Mudring A.-V.
    Ionothermal Synthesis of the first Luminescent Open-Framework Manganese Borophosphate with Switchable Magnetic Properties
    Eur. J. Inorg. Chem. 18 (2012) 3032-3038



  • Valldor M., Hermann R.P., Wuttke J., Zamponi M., Schweika W.
    Spin correlations in the extended kagome system YBaCo3FeO7
    Phys. Rev.  B 84 (2011) 224426
  • Sanjay M., Lisong X., Jingtian L., Brougham D., Fadeel B., Kiessling F., Valldor M., Schmidt A.
    Water-Soluble Superparamagnetic Magnetite Nanoparticles with biocompatible coating for enhanced magnetic resonance imaging (MRI)
    ACS Nano 5 (2011) 6315-6324
  • Brühmann M., Mudring A-.V., Valldor M., Meyer G.
    {Os5Lu20}I24, the first extended cluster complex of lutetium with eight-coordinate endohedral osmium atoms in two different environments
    Eur. J. Inorg. Chem. 2011 (2011) 4083-4088
  • Valldor M., Uthe A., Rückamp R.
    Antiferromagnetic ground state of quantum spins in synthetic Imanite, Ca3Ti2Si3O12: the lost child of the garnet family.
    Inorg. Chem.  50 (2011) 10107-10112
  • Bäcker T., Breunig O., Valldor M., Merz K., Vasilieva V., Mudring A.-V.
    In-situ crystal growth and properties of the magnetic ionic liquid [C2mim][FeCl4]
    Crystal Growth and Design  11 (2011) 2564-2571
  • Niesen S., Heyer O., Lorenz T., Valldor M.
    Antiferromagnetic Heisenberg S=5/2 spin chain compound SrMn2V2O8
    J. Magn. Magn. Mater. 323 (2011) 2575-2578
  • Hollmann N., Hu Z., Wu H., Valldor M., Qureshi N., Willers T., Chin Y.-Y., Cezar J.C., Tanaka A., Brookers N.B., Tjeng L.H.
    Orbital occupation and magnetic moments of tetrahedrally coordinated iron in CaBaFe4O7
    Phys. Rev.  B, Rapid Comm. 83 (2011) 180405
  • Valldor M., Heyer O., Komarek A.C., Braden M., Lorenz T.
    Magnetostrictive Néel ordering of the spin-5/2 ladder compound BaMn2O3: Distortion-induced lifting of geometrical frustration
    Phys. Rev.  B 83 (2011) 024418
  • Valldor M., Breunig O.
    Crystal structure and properties of the manganese containing Swedenborgite YBaMn3AlO7
    Solid State  Sci. 13 (2011) 831-836




  • Valkeapää M., Valldor M., Lidin S., Lada T., Morawski A. Eriksson S.
    Single crystal growth and structure determination of misfit layer oxide [Sr2TlO3][CoO2]1.77
    J. Cryst. Growth 306 (2007) 233-239
  • Schweika W., Valldor M., Lemmens P.
    Approaching the ground state of the kagomé antiferromagnet
    Phys. Rev.  Lett. 98 (2007) 067201
  • Valldor M.
    The new compound YBaCo4O7 and its homologues exhibiting strong magnetic frustration
    Chap.3 in New Topics in Condensed Matter Research, Editors Velle L.R., Chang J.V., Nova Science publishers (2007) 75-102



  • Valldor M.
    Magnetic investigations on six compounds with the general formula (Ca,Y)Ba(Co,Fe,Al,Zn)4O7 and the structures of YBaCoFeZn2O7 and YBaCo2FeZnO7
    Solid State Sci. 7 (2005) 1163-1172
  • Valldor M.
    Magnetic properties of compounds in the system CaBaCo4-x-yZnxAlyO7 (x = 0,1,2, y = 0,1)
    J. Phys. Chem. Solids 66 (2005) 1025-1033
  • Emme H., Valldor M., Pöttgen R., Huppertz H.
    Associating borate and silicate chemistry by extreme conditions: high-pressure synthesis, crystal structure and properties of the new borates RE3B5O12 (RE = Er - Lu)
    Chem. Mater. 17 (2005) 2707-2715





  • Ghorbani S.R., Lundqvist P., Andersson M., Valldor M., Rapp Ö.
    Thermoelectric power and resistivity of Nd1-xPrxBa2Cu3O7-δ
    Physica  C 353 (2001) 77-84




Talks/Seminars with Site, Date, and Title

Hemdsärmelkolloquium, Kiel, 7-9 March 2019
• "Polarität für nichtlineare Optik"

ECCG6, Varna, Bulgaria, 17-20 September 2018
(invited) "Anti-Perovskite lithium battery cathodes"

Hemdsärmelkolloquium, Leipzig, 8-10 March 2018
• "Ungewollt angewandt"

EMN 3CG, Berlin, 7-11 August 2017
(invited) "Single Crystal Growth of New Energy Storage Materials"

ECSSC16, Glasgow, 23-26 July 2017
• "Novel Anti-Perovskite Li-Battery Cathode Materials"

Hemdsärmelkolloquium, Augsburg, 16-18 March 2017
• "Die Eine fürs Leben"

Privatdozenten-Tagung, Marburg, 13-15 March 2017
• "Innovative kristalline Feststoffe - für Grundlagen und Angewandtes"

Hemdsärmelkolloquium, Karlsruhe, 17-19 March 2016
• "Drei in Einem"

High-Field Lab, Helmholtz-Zentrum, Dresden-Rossendorf, 28 October 2015
(invited) "Heteroleptically coordinated iron on ladders in novel compounds"

European Conference on Solid State Chemistry (ECSSC), Vienna, 24-26 August 2015
• "Synthesis and characterization of Ba[CoSO]: magnetic complexity and chalcogen ordering"

Hemdsärmelkolloquium, München, 26-28 February 2015
• "Ein Anionenkonzept"

Aalto University, Helsinki, 26 November 2014
(invited) "Composite Anionic Lattices to Obtain Chemical Diversity"

Aalto University, Helsinki, 7 August 2012
(invited) "Composite Anionic Structures"

IFF, IFW, Dresden, 25 June 2012
(invited) "Crystal growth of Swedenborgites and their physical properties"

Hemdsärmelkolloqium, Oldenburg 8-10 March 2012
• ""New" aspects of chemical research"

Tag der Selten Erden, Terrae Rarae, Karlsruhe 12-14 October 2011
• "Complex magnetism in new rare-earth metal compounds"

Invited talk, SFB608 Workshop 2009 - Kerkrade 2 October 2009
• "New Swedenborgites - a playground for chemistry and physics"

DPG 2009, Dresden 23 March 2009
• "Polarized neutron scattering on geometrically frustrated magnets with Swedenborgite structure"

DPG 2007, Regensburg 27 March 2007
• "The antiferromagnetic ground state on 2D kagomé lattices in Y0.5Ca0.5BaCo4O7"

Institute for Solid State Science (IFF), FZ Jülich, Jan. 2006
(invited) "The new compound YBaCo4O7 and its homologues exhibiting strong magnetic frustration"

II. Solid State Physics Department, Universität zu Köln Nov. 2005
(invited) "The new compound YBaCo4O7 and its homologues exhibiting strong magnetic frustration"

Solid State Physics Department, Technische Universität Braunschweig 2005
(invited) "Disordered magnetism in a new cobalt oxide"

Hemdsärmelkolloquium, Dortmund 13-15 March 2003
• "Magnetic Disorder in a Structurally Frustrated Co-oxide Based System"

Alexander von Humboldt Tagung, Bochum 2003
• "Weak Magnetism in a Co-Based Metal-Oxide"

Workshop SSF OXIDE 2002, Göteborg 7-8 March 2002
• "15 min - Weak magnetism of Metal-oxides"

Crystallography Summer School Erice 22 May-1 June 2001
• "Studies of the new compound YBaCo4O7"

Workshop SSF OXIDE 2001, MC2 Göteborg 5-6 April 2001
• "Magnetism of 3d-transition metal based oxides"

MOS-99, Stockholm 28 July-2 August 1999
• "Studies of both alkali earth metal sites in Hg,Tl-based 2212 and 1212 superconductors"

4th Swedish-Russian Conf. on Mixed-Valency Metal Oxides Sånga-Säby 23-26 April 1999
• "Investigations of structure and composition related to transition temperature for Tl,Hg-based superconductors"

Fall Meeting MRS 98, Boston, Massachusetts 30 November-4 December 1998
• "A comparative study of Tl,Hg-based 2212 type superconductors"