Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 25: Magnetic Heusler Compounds
MA 25.10: Vortrag
Mittwoch, 13. März 2013, 11:45–12:00, H10
Giant non-collinear magnetism and a spin reorientation in Mn2RhSn Heusler compound. — •Olga Meshcheriakova1,2, Ajaya K. Nayak3, Stanislav Chadov3, Jürgen Kübler4, Teuta Gasi1, Vadim Ksenofontov1, Walter Schnelle3, Alexander Tsirlin3, and Claudia Felser1,2,3 — 1Institut für Anorganische und Analytische Chemie, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany — 3Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany — 4Institut für Festkörperphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
Magnetic, structural, heat and transport properties of the bulk polycrystalline Mn2RhSn tetragonal Heusler compound have been investigated. A field-driven magnetic transition was observed within a temperature range between 50 and 100 K. Such behavior was attributed to the non-collinear magnetism which results as competition between the anisotropy induced by tetragonal strain and typical antiparallel alignment of two Mn magnetic sublattices. According to the additional first-principles calculations, the present material exhibits a huge angle between these two magnetic sublattices. The experimentally measured saturated magnetization (of 2 µB per formula unit) was reasonably explained by combining the non-collinear magnetic calculations with the effects of an antisite disorder indicated by Moessbauer measurements.
This work is supported by the Graduate School of Excellence Materials Science in Mainz (MAINZ).