Magneto-optic and transverse transport properties of non-collinear antiferromagnets
Sebastian Wimmer, Sergiy Mankovsky, J\'an Min\'ar, Alexander N., Yaresko, Hubert Ebert
TL;DR
This paper investigates the magneto-optic Kerr effect and transverse transport properties in non-collinear antiferromagnets, extending previous studies on the anomalous Hall effect to include optical phenomena and alloy composition effects.
Contribution
It provides a group-theoretical analysis of conductivity tensors and calculates MOKE and XMCD spectra for various spin configurations in Mn3X compounds, including alloy concentration effects.
Findings
Confirmed the shape of the conductivity tensor for different spin states.
Estimated the size of magneto-optic effects from spectra.
Studied concentration dependence of Hall conductivities in Mn3IrPt and Mn3PtRh alloys.
Abstract
Previous studies on the anomalous Hall effect in coplanar non-collinear antiferromagnets are revisited and extended to magneto-optic properties, namely magneto-optic Kerr effect (MOKE) and X-ray magnetic dichroism (XMCD). Starting from group-theoretical considerations the shape of the frequency-dependent conductivity tensor for various actual and hypothetical spin configurations in cubic and hexagonal Mn compounds is determined. Calculated MOKE and X-ray dichroism spectra are used to confirm these findings and to give estimates of the size of the effects. For MnIrPt and MnPtRh alloys the concentration dependence of the anomalous and spin Hall conductivity is studied in addition.
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