SKM 2021 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 4: Focus Session: Correlated van-der-Waals Magnets
TT 4.3: Talk
Monday, September 27, 2021, 14:15–14:30, H7
Tuning Magnetic and Transport Properties in Quasi-2D (Mn1−xNix)2P2S6 Single Crystals — •S. Aswartham1, Y. Shemerliuk1, Y. H. Zhou2, Z. R. Yang2, G. Cao3, A.U.B. Wolter1, and B. Büchner1, 4 — 1Institut für Festkörperforschung, Leibniz IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 2Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China — 3Department of Physics, University of Colorado at Boulder, Boulder, CO 80309, USA — 4Institut für Festkörper-und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
We report an optimized chemical vapor transport method to grow single crystals of (Mn1−xNix)2P2S6 where x = 0, 0.3, 0.5, 0.7, and 1. The structural characterization shows that all crystals crystallize in monoclinic symmetry with the space group C2/m (No. 12). The magnetic measurements of the all as-grown single crystals show long range antiferromagnetic order along all principal crystallographic axes. Overall, the Néel temperature TN is non-monotonous; with increasing Ni2+ doping, the temperature of the antiferromagnetic phase transition first decreases from 80 K for pristine (Mn2P2S6 (x = 0) up to x= 0.5 and then increases again to 155 K for pure Ni2P2S6 (x = 1). We show that, the magnetic anisotropy switches from out-of-plane to in-plane as a function of composition.