Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 10: Magnetic Heuslers, Half-Metals and Oxides I (organized by MA)

TT 10.4: Vortrag

Montag, 31. März 2014, 10:15–10:30, BEY 118

Large non-collinearity and spin reorientation in the Mn2YSn Heusler family — •O. Meshcheriakova^1,2, S. Chadov¹, A. Nayak¹, J. Kübler³, J. Kiss¹, G. Andé⁴, A. Tsirlin¹, W. Schnelle¹, M. Nicklas¹, and C. Felser^1,2 — ¹Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden Germany — ²Graduate School of Excellence "Materials Science in Mainz", 55128 Mainz, Germany — ³Institut für Festkörperphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — ⁴Laboratoire Léon Brillouin, CEA-CNRS Saclay, Gif-sur-Yvette Cedex, France

Non-collinear magnets provide essential ingredients for next generation memory technology. Recent discoveries have demonstrated the possibility to move certain non-collinear spin structures (skyrmions) at significantly low current densities. To establish such magnetic arrangement, the corresponding materials should possess a non-centrosymmetric crystal structure together with high spin-orbit coupling. Heusler compounds show diverse fundamental properties but in the context of non-collinearity they were not considered so far. Here we present a novel non-collinear tetragonal Mn2RhSn Heusler material exhibiting unusually strong canting of its magnetic sublattices. It undergoes a spin-reorientation transition, induced by a temperature change and suppressed by the external magnetic field. In addition, because of the non-centrosymmetric structure, Dzyaloshinskii-Moriya exchange and magnetic anisotropy, Mn2RhSn is supposed to be a promising candidate for realizing the skyrmion state in the Heusler family.