Anomalous Hall effect in magnetic insulator heterostructures: Contributions from spin-Hall and magnetic-proximity effects

Ding S, Liang Z, Yun C, Wu R, Xue M, Lin Z, Ross A, Becker S, Yang W, Ma X, Chen D, Sun K, Jakob G, Klaeui M, Yang J (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Physical Review B American Physical Society

Book Volume: 104

Article Number: A49

Journal Issue: 22

DOI: 10.1103/PhysRevB.104.224410

Abstract

In this letter, we study the origin of the anomalous Hall effect (AHE) in ferrimagnetic insulator Tm3Fe5O12 (TmIG)/Pt heterostructures. A monotonic decrease of the anomalous Hall resistivity (ΔρAHE) with decreasing temperature is observed for TmIG/Pt, and a sign reversal of ΔρAHE occurs at around 80 K. With the addition of a Cu interlayer, the ΔρAHE similarly decreases as a function of temperature, but maintains the same sign across the full temperature range. This indicates that both the magnetic-proximity effect and spin Hall effect in the TmIG/Pt bilayer contribute to the AHE signal with opposing signs. The spin-Hall contribution to the AHE is dominant at room temperature but decreases with decreasing temperature. Meanwhile, the magnetic-proximity contribution to the AHE becomes dominant with decreasing temperatures, leading to a change of sign for ΔρAHE. We exclude a dominant influence of a ferrimagnetic compensation point in the temperature region by complementary magnetic hysteresis and neutron diffraction measurements. Our work, based on a simple method, sheds light on the origin of the AHE in magnetic insulator heterostructures, where the competition between the magnetic-proximity effect and spin Hall effect governs the sign and amplitude of the AHE.

Involved external institutions

Peking University (PKU) / 北京大学 CN China (CN) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) École Polytechnique - Université Paris-Saclay FR France (FR) China Institute of Atomic Energy (CIAE) / 中国原子能科学研究院 CN China (CN)

How to cite

APA:

Ding, S., Liang, Z., Yun, C., Wu, R., Xue, M., Lin, Z.,... Yang, J. (2021). Anomalous Hall effect in magnetic insulator heterostructures: Contributions from spin-Hall and magnetic-proximity effects. Physical Review B, 104(22). https://doi.org/10.1103/PhysRevB.104.224410

MLA:

Ding, Shilei, et al. "Anomalous Hall effect in magnetic insulator heterostructures: Contributions from spin-Hall and magnetic-proximity effects." Physical Review B 104.22 (2021).

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