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

Sürgers, Christoph; Wolf, Thomas; Adelmann, Peter; Kittler, Wolfram; Fischer, Gerda; v. Löhneysen, Hilbert

Abstract (englisch):
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.


Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1038/srep42982
ISSN: 2045-2322
KITopen ID: 1000065982
HGF-Programm 43.21.01; LK 01
Erschienen in Scientific reports
Band 7
Seiten Art.Nr.: 42982
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