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arXiv · 2504.02166

Exploring non-collinear magnetic ground states in tetragonal Mn$_2$-based Heusler compounds

Jorge Cardenas-Gamboa·Edouard Lesne·Arthur Ernst·Maia G. Vergniory·Paul McClarty·Claudia Felser
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Abstract

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 Mn$_2$-based Heuslers the magnetism is typically collinear. An exception is Mn$_2$RhSn 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.

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Jorge Cardenas-Gamboa, Edouard Lesne, Arthur Ernst, Maia G. Vergniory, Paul McClarty, Claudia Felser. 2025-04-02. Exploring non-collinear magnetic ground states in tetragonal Mn$_2$-based Heusler compounds. https://arxiv.org/abs/2504.02166

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