Gradual pressure-induced change in the magnetic structure of the non-collinear antiferromagnet Mn${}_3$Ge

Abstract

By means of powder neutron diffraction we investigate changes in the magnetic structure of the coplanar non-collinear antiferromagnet Mn${}_3$Ge caused by an application of hydrostatic pressure up to 5\phantom{ }GPa. At ambient conditions the kagomé layers of Mn atoms in Mn${}_3$Ge order in a triangular 120${}^{\circ }$ spin structure. Under high pressure the spins acquire a uniform out-of-plane canting, gradually transforming the magnetic texture to a non-coplanar configuration. With increasing pressure the canted structure fully transforms into the collinear ferromagnetic one. We observed that magnetic order is accompanied by a noticeable magnetoelastic effect, namely, spontaneous magnetostriction. The latter induces an in-plane magnetostrain of the hexagonal unit cell at ambient pressure and flips to an out-of-plane strain at high pressures in accordance with the change of the magnetic structure.

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• Giant Anomalous Nernst Effect in Noncollinear Antiferromagnetic Mn-based Antiperovskite Nitrides
• Observation of an Anomalous Hall Effect in Single-crystal Mn3Pt
• Pressure tuning of the anomalous Hall effect in the chiral antiferromagnet Mn3Ge
• Benchmark for Ab Initio Prediction of Magnetic Structures based on Cluster-Multipole Theory
• Magnon-polaron excitations in the noncollinear antiferromagnet Mn${}_3$Ge
• Magnetic and electrical transport signatures of uncompensated moments in epitaxial thin films of the non-collinear antiferromagnet Mn${}_3$Ir
• Strong Magneto-Elastic Coupling in Mn${}_3$X (X = Ge, Sn)
• Unconventional magneto-resistance, and electronic transition in Mn${}_3$Ge Weyl semimetal
• Strain tuning the magnetic and transport properties of Mn${}_3$Ge
• Magnetic interactions in AB-stacked kagome lattices: magnetic structure, symmetry, and duality
• Tuning the Hall response of a noncollinear antiferromagnet via spin-transfer torques and oscillating magnetic fields
• Weyl points and anomalous transport effects tuned by the Fe doping in Mn${}_3$Ge Weyl semimetal
• Strain-tunable anomalous Hall effect in hexagonal MnTe
• Unusual Multiple Magnetic Transitions and Anomalous Hall Effect Observed in Antiferromagnetic Weyl Semimetal, Mn${}_{2.94}$Ge (Ge-rich)
• Intrinsic Topological Weyl Phase Transition Induced by a Magnetostructural Transformation in a Kagome Magnet
• Uniaxial stress tuning of the anomalous Hall effect in Mn3Ge