Anomalous Hall effect in the noncollinear antiferromagnet Mn5Si3
C. S\"urgers, W. Kittler, T. Wolf, H. v. Loehneysen
TL;DR
This study investigates the anomalous Hall effect in Mn5Si3, a metallic antiferromagnet with complex magnetic structures, revealing additional Hall contributions due to noncollinear magnetic arrangements and identifying a new magnetic phase.
Contribution
It provides experimental evidence of anomalous Hall contributions from noncollinear magnetic structures in Mn5Si3 and uncovers a new magnetic phase via Hall measurements.
Findings
Additional anomalous Hall contribution linked to noncollinear magnetic order
Detection of a new magnetic phase above a metamagnetic transition
Magnetotransport measurements on polycrystalline and single crystal samples
Abstract
Metallic antiferromagnets with noncollinear orientation of magnetic moments provide a playground for investigating spin-dependent transport properties by analysis of the anomalous Hall effect. The intermetallic compound Mn5Si3 is an intinerant antiferromagnet with collinear and noncollinear magnetic structures due to Mn atoms on two inequivalent lattice sites. Here, magnetotransport measurements on polycrystalline thin films and a single crystal are reported. In all samples, an additional contribution to the anomalous Hall effect attributed to the noncollinear arrangment of magnetic moments is observed. Furthermore, an additional magnetic phase between the noncollinear and collinear regimes above a metamagnetic transition is resolved in the single crystal by the anomalous Hall effect.
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