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 Saunderson^1,2, Fabian Lux¹, Dongwook Go¹, Hasan Abdullah³, Tetsuya Hajiri⁴, Hidefumi Asano⁴, Udo Schwingenschloegl³, Yuriy Mokrousov^1,2, and Mathias Klaeui¹ — ¹Institute 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).