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SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 31: Functional Antiferromagnetism II

MA 31.5: Vortrag

Mittwoch, 29. März 2023, 16:15–16:30, HSZ 04

In plane magnetic field dependence of anomalous Hall effect in a non-collinear antiferromagnet — •Adithya Rajan1, Tom Saunderson1,2, Fabian Lux1, Dongwook Go1, Hasan Abdullah3, Tetsuya Hajiri4, Hidefumi Asano4, Udo Schwingenschloegl3, Yuriy Mokrousov1,2, and Mathias Klaeui11Institute of Physics, Johannes Gutenberg University, Staudingerweg 7, 55128 Mainz, Germany — 2Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich, 52424 Jülich, Germany — 3King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia — 4Department of Materials Physics, Nagoya University, Nagoya 464-8603, Japan

Non-collinear antiferromagnets (NC-AFM) have attracted much attention recently due to the observation of the anomalous Hall effect (AHE) in these materials [1]. Here we study the AHE as a function of magnetic field direction in the Kagome plane of the antiperovskite nitride Mn3Ni0.35Cu0.65N. We explain the results in the context of irreducible representations of the three-spin unit cell, showing a strong interplay between field dependence of AHE and the octupole moment by fitting to density functional theory calculations. Further, we present non-trivial features in the field dependent AHE loops signifying additional stable spin configurations, and potentially novel transport phenomena. These results open the possibility of a lever through which the spin structure in NC-AFMs can be controlled.

[1] S.Nakatsuji et al., Nature 527, 212 (2015).

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