Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet

Abstract

The anomalous Hall effect (AHE), which in long-range ordered ferromagnets appears as a voltage transverse to the current and usually is proportional to the magnetization, often is believed to be of negligible size in antiferromagnets due to their low uniform magnetization. However, recent experiments and theory have demonstrated that certain antiferromagnets with a non-collinear arrangement of magnetic moments exhibit a sizeable spontaneous AHE at zero field due to a non-vanishing Berry curvature arising from the quantum mechanical phase of the electron's wave functions. Here we show that antiferromagnetic Mn5Si3 single crystals exibit a large AHE which is strongly anisotropic and shows multiple transitions with sign changes at different magnetic fields due to field-induced rearrangements of the magnetic structure despite only tiny variations of the total magnetization. The presence of multiple non-collinear magnetic phases offers the unique possiblity to explore the details of the AHE and the sensitivity of the Hall effect on the details of the magnetic texture.

arXiv comment10 pages, 5 Figures

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• Interfacial Dzyaloshinskii-Moriya Interaction of Antiferromagnetic Materials
• Antiferromagnetic metal phase in an electron-doped rare-earth nickelate
• Piezospintronic effect in antiperovskite Mn${}_3$GaN
• Complex magnetic structure and spin waves of the noncollinear antiferromagnet Mn5Si3
• Anomalous Nernst effect in the noncollinear antiferromagnet Mn${}_5$Si${}_3$
• Magnetotransport as a probe of phase transformations in metallic antiferromagnets: the UIrSi${}_3$ case
• Spin-waves in the collinear antiferromagnetic phase of Mn$_\bf{5}$Si$_\bf{3}$
• Magnetic phase diagram, magnetotransport and inverse magnetocaloric effect in the noncollinear antiferromagnet Mn${}_5$Si${}_3$
• An overview of the spin dynamics of antiferromagnetic Mn${}_5$Si${}_3$
• Chirality-induced linear response properties in non-coplanar Mn${}_3$Ge
• NiSi: New venue for antiferromagnetic spintronics
• Magnetic ground state and perturbations of the distorted kagome Ising metal TmAgGe
• Eightfold Degenerate Dirac Nodal Line in Collinear Antiferromagnet Mn${}_5$Si${}_3$
• Enhanced anomalous Nernst effects in ferromagnetic materials driven by Weyl nodes
• Spin order and excitations in the collinear kagome antiferromagnet Y${}_{0.5}$Fe${}_3$Sn${}_3$