title: 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 Mn5Si3single 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.
authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Sürgers
authors.affiliation: Institut für Festkörperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Wolf
authors.affiliation: Institut für Festkörperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Adelmann
authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany.
authors.forename: Wolfram
authors.initials: W
authors.lastname: Kittler
authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany.
authors.forename: Gerda
authors.initials: G
authors.lastname: Fischer
authors.affiliation: Physikalisches Institut, Karlsruhe Institute of Technology, P.O. Box 6980, 76049 Karlsruhe, Germany.|Institut für Festkörperphysik, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: Hilbert V
authors.initials: HV
authors.lastname: Löhneysen