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  1. Article

    Open Access

    Confirming the trilinear form of the optical magnetoelectric effect in the polar honeycomb antiferromagnet Co2Mo3O8

    Magnetoelectric phenomena are intimately linked to relativistic effects and also require the material to break spatial inversion symmetry and time-reversal invariance. Magnetoelectric coupling can substantiall...

    S. Reschke, D. G. Farkas, A. Strinić, S. Ghara, K. Guratinder… in npj Quantum Materials (2022)

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  2. Article

    Open Access

    Giant conductivity of mobile non-oxide domain walls

    Atomically sharp domain walls in ferroelectrics are considered as an ideal platform to realize easy-to-reconfigure nanoelectronic building blocks, created, manipulated and erased by external fields. However, c...

    S. Ghara, K. Geirhos, L. Kuerten, P. Lunkenheimer, V. Tsurkan… in Nature Communications (2021)

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  3. No Access

    Article

    Pressure-Induced Semiconductor-Semimetal Transition in Rb0.8Fe1.6S2

    The transport and magnetic properties of the Rb0.8Fe1.6S2 crystal have been studied under quasihydrostatic compression to a pressure of 40.5 GPa in diamond anvil cells. A semiconductor-semimetal electronic transi...

    A. O. Baskakov, Yu. L. Ogarkova, I. S. Lyubutin, S. S. Starchikov… in JETP Letters (2019)

  4. No Access

    Article

    DFT and Mössbauer Spectroscopy Study of a FeTe0.5Se0.5 Single Crystal

    The iron based superconductor FeSe0.5Te0.5 has been studied applying Mössbauer spectroscopy and ab initio density functional theory calculations of hyperfine parameters of iron nuclei. It has been shown that the ...

    A. G. Kiiamov, D. A. Tayurskii, F. G. Vagizov, D. Croitori, V. Tsurkan… in JETP Letters (2019)

  5. Article

    Open Access

    Equilibrium Skyrmion Lattice Ground State in a Polar Easy-plane Magnet

    The skyrmion lattice state (SkL), a crystal built of mesoscopic spin vortices, gains its stability via thermal fluctuations in all bulk skyrmion host materials known to date. Therefore, its existence is limite...

    S. Bordács, A. Butykai, B. G. Szigeti, J. S. White, R. Cubitt… in Scientific Reports (2017)

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  6. No Access

    Article

    Magnetic properties of chain antiferromagnets RbFeSe2, TlFeSe2, and TlFeS2

    Single crystals of ternary ion chalcogenides RbFeSe2, TlFeSe2, and TlFeS2 are studied by X-ray diffraction, SQUID magnetometry, and Mössbauer spectroscopy. Common structural units of these chalcogenides are tetra...

    Z. Seidov, H. -A. Krug von Nidda, V. Tsurkan… in Bulletin of the Russian Academy of Science… (2017)

  7. No Access

    Article

    Néel-type skyrmion lattice with confined orientation in the polar magnetic semiconductor GaV4S8

    Following the early prediction of the skyrmion lattice (SkL)—a periodic array of spin vortices—it has been observed recently in various magnetic crystals mostly with chiral structure. Although non-chiral but p...

    I. Kézsmárki, S. Bordács, P. Milde, E. Neuber, L. M. Eng, J. S. White… in Nature Materials (2015)

  8. Article

    Open Access

    FeCr2S4 in magnetic fields: possible evidence for a multiferroic ground state

    We report on neutron diffraction, thermal expansion, magnetostriction, dielectric and specific heat measurements on polycrystalline FeCr2S4 in external magnetic fields. The ferrimagnetic ordering temperatures TC ...

    J. Bertinshaw, C. Ulrich, A. Günther, F. Schrettle, M. Wohlauer… in Scientific Reports (2014)

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  9. No Access

    Article

    Orbital-selective metal–insulator transition and gap formation above TC in superconducting Rb1−xFe2−ySe2

    Understanding the origin of high-temperature superconductivity in copper- and iron-based materials is one of the outstanding tasks of current research in condensed matter physics. Even the normal metallic stat...

    Zhe Wang, M. Schmidt, J. Fischer, V. Tsurkan, M. Greger… in Nature Communications (2014)

  10. No Access

    Article

    Absence of polar order in LuFe2O4

    LuFe2O4 often is considered as a prototypical multiferroic with polar order arising from the electronic degrees of freedom only (“electronic ferroelectricity”). In the present work, we check the intrinsic nature ...

    A. Ruff, S. Krohns, F. Schrettle, V. Tsurkan… in The European Physical Journal B (2012)

  11. No Access

    Article

    Superconductivity at Tc = 44 K in LixFe2Se2(NH3)y

    Following a recent proposal by Burrard-Lucas et al. [ar**v:1203.5046] we intercalated FeSe with Li in liquid ammonia. We report on the synthesis of new Li x Fe2Se2(NH3) ...

    E. -W. Scheidt, V. R. Hathwar, D. Schmitz, A. Dunbar… in The European Physical Journal B (2012)

  12. No Access

    Article

    Spin re-orientation in FeCr2S4

    The spinel FeCr2S4has been studied intensely for its peculiar magnetic and local structural changes which are sensitively influenced by the Jahn–Teller properties of Fe2 + in tetrahedral sulfur coordination. Rece...

    J. Engelke, F. J. Litterst, A. Krimmel, A. Loidl, F. E. Wagner… in Hyperfine Interactions (2011)

  13. No Access

    Article

    Physical properties of FeSe0.5Te0.5 single crystals grown under different conditions

    We report on structural, magnetic, conductivity, and thermodynamic studies of FeSe0.5Te0.5 single crystals grown by self-flux and Bridgman methods. The lowest values of the susceptibility in the normal state, th...

    V. Tsurkan, J. Deisenhofer, A. Günther, Ch. Kant… in The European Physical Journal B (2011)

  14. No Access

    Article

    Frustration driven magnetic states of A-site spinels probed by μSR

    The normal A-site spinels MnAl2O4, FeAl2O4, CoAl2O4, as well as related mixed (Mn0.5Fe0.5Al2O4) and partially inverted (Fe1.4Al1.6O4) spinels have been studied by μSR. The magnetic ions are subject to magnetic fr...

    G. M. Kalvius, A. Krimmel, O. Hartmann, F. J. Litterst… in The European Physical Journal B (2010)

  15. No Access

    Article

    Lattice Instabilities in the Frustrated Magnet CdCr2O4: An Ultrasonic Study

    We report results on ultrasound studies of the frustrated magnet CdCr2O4. This compound demonstrates an antiferromagnetic ordering at T N =7.8 K and a me...

    S. Zherlitsyn, O. Chiatti, A. Sytcheva, J. Wosnitza… in Journal of Low Temperature Physics (2010)

  16. No Access

    Article

    Optical properties of ZnCr2Se4

    We studied the optical properties of antiferromagnetic ZnCr2Se4 by infrared spectroscopy up to 28,000 cm-1 and for temperatures from 5 to 295 K. At the magnetic phase transition at 21 K, one of the four phonon mo...

    T. Rudolf, Ch. Kant, F. Mayr, M. Schmidt, V. Tsurkan… in The European Physical Journal B (2009)

  17. No Access

    Article

    Relaxor ferroelectricity and colossal magnetocapacitive coupling in ferromagnetic CdCr2S4

    Ferromagnets have been known since ancient times. Ferroelectrics were discovered 80 years ago, and both properties are important in many areas of technology and electronics. Materials displaying both ferroelec...

    J. Hemberger, P. Lunkenheimer, R. Fichtl, H.-A. Krug von Nidda, V. Tsurkan… in Nature (2005)

  18. No Access

    Article

    Structural phase transition at the percolation threshold in epitaxial (La0.7Ca0.3MnO3)1–x:(MgO)x nanocomposite films

    'Colossal magnetoresistance' in perovskite manganites such as La0.7Ca0.3MnO3 (LCMO), is caused by the interplay of ferro-paramagnetic, metal–insulator and structural phase transitions. Moreover, different electro...

    V. Moshnyaga, B. Damaschke, O. Shapoval, A. Belenchuk, J. Faupel… in Nature Materials (2003)

  19. No Access

    Article

    Splitting of the Cr 2p ions states in some ternary sulphides and selenides

    X-ray photoelectron spectroscopy was used to investigate ACr2S4 ( \((A = cd,Zn,Mn,Fe,Fe:Cu)\) and BCr2Se4 ( ...

    V. Tsurkan, St. Plogmann, M. Demeter… in The European Physical Journal B - Condense… (2000)