2025/04/02 by Cardenas-Gamboa, Jorge, Lesne, Edouard, Ernst, Arthur +3
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci)
paper · doi:10.48550/arxiv.2504.02166
Heusler compounds constitute a large family of intermetallic materials notable for their wide variety of properties such as magnetism, multi-ferroicity, nontrivial band topology, superconductivity and so on. Among their magnetic properties one finds a tremendous variety of states from simple ferromagnetism to skyrmion crystals. In most Mn2-based Heuslers the magnetism is typically collinear. An exception is Mn2RhSn in which an unusual ground state with magnetic canting and a temperature-induced spin re-orientation into the collinear ferrimagnetic phase has been reported from experiments. In this work, we employ first-principles calculations and mean field theory to provide a simple account of the unusual phase diagram in this magnet. We also highlight Weyl points in the computed band structure of \mrs and the resulting Fermi arcs.