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
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-7324
Version:	Accepted version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	In Copyright
Information on rights of use:	http://rightsstatements.org/vocab/InC/1.0/
Journal:	Physical review : B 104 22
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