Exchange biased Anomalous Hall Effect driven by frustration in a magnetic Kagome lattice

Abstract

Co3Sn2S2 is a ferromagnetic Weyl semimetal that has been the subject of intense scientific interest due to its large anomalous Hall effect. We show that the coupling of this material's topological properties to its magnetic texture leads to a strongly exchange biased anomalous Hall effect. We argue that this is likely caused by the coexistence of ferromagnetism and spin glass phases, the latter being driven by the geometric frustration intrinsic to the Kagome network of magnetic ions.

14 pages total, 5 figures

References in corpus (9)

• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
• Large exchange bias after zero-field cooling from an unmagnetized state
• Design of compensated ferrimagnetic Heusler alloys for giant tunable exchange bias
• Tunable Berry Curvature Through Magnetic Phase Competition in a Topological Kagome Magnet
• Low-field anomalous magnetic phase in the kagome-lattice shandite Co3Sn2S2
• Observation of superparamagnetism in coexistence with quantum anomalous Hall C=$\pm$1 and C=0 Chern states

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• Doping Dependence of the in-Plane Transition in Co${}_3$Sn${}_2$S${}_2$
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• NMR study of the local magnetic order in the kagome Weyl semimetal Co${}_3$Sn${}_2$S${}_2$