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Authors: Ding, Shilei
Liang, Zhongyu
Yun, Chao
Wu, Rui
Xue, Mingzhu
Lin, Zhongchong
Ross, Andrew
Becker, Sven
Yang, Wenyun
Ma, Xiaobai
Chen, Dongfeng
Sun, Kai
Jakob, Gerhard
Kläui, Mathias
Yang, Jinbo
Title: Anomalous Hall effect in magnetic insulator heterostructures : contributions from spin-Hall and magnetic-proximity effects
Online publication date: 7-Jul-2022
Year of first publication: 2021
Language: english
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 (ApAHE) with decreasing temperature is observed for TmIG/Pt, and a sign reversal of ApAHEoccurs at around 80 K. With the addition of a Cu interlayer, the ApAHEsimilarly 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 magneticproximity contribution to the AHE becomes dominant with decreasing temperatures, leading to a change of sign for ApAHE. 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.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Accepted version
Publication type: Zeitschriftenaufsatz
Document type specification: Scientific article
License: In Copyright
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Journal: Physical review : B
Pages or article number: 224410
Publisher: American Physical Society
Publisher place: College Park, Md.
Issue date: 2021
ISSN: 2469-9950
Publisher DOI: 10.1103/PhysRevB.104.224410
Appears in collections:JGU-Publikationen

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