Strongly heat-assisted spin–orbit torque switching of a ferrimagnetic insulator

Ren, Zheyu; Qian, Kun; Aldosary, Mohammed; Liu, Yuting; Cheung, Shun Kong; Ng, Isaac; Shi, Jing; Shao, Qiming

doi:10.1063/5.0049103

Strongly heat-assisted spin–orbit torque switching of a ferrimagnetic insulator

Journal Article · Mon May 17 00:00:00 EDT 2021 · APL Materials

DOI:https://doi.org/10.1063/5.0049103· OSTI ID:1851735

^[1]; Qian, Kun ^[2]; Aldosary, Mohammed ^[3]; Liu, Yuting ^[2]; ^[2]; Ng, Isaac ^[2]; ^[4]; ^[2]

Hong Kong University of Science and Technology (HKUST) (Hong Kong); Hong Kong University of Science and Technology (HKUST) (Hong Kong)
Hong Kong University of Science and Technology (HKUST) (Hong Kong)
Univ. of California, Riverside, CA (United States). King Saud Univ., Riyadh (Saudi Arabia)
Univ. of California, Riverside, CA (United States)

Ferrimagnetic insulators promise low-power and high-speed spintronic applications, thanks to their insulating nature and fast dynamics near compensation points. In a ferrimagnetic insulator/heavy metal heterostructure, we investigate field- and current-induced magnetization switching at various temperatures and observe distinct magnetization switching behaviors owing to spin-orbit torque (SOT) and heating effect. We have realized SOT switching across the magnetization compensation temperature and discovered that the SOT switching is strongly heat-assisted: the temperature is always above the compensation temperature while the SOT switching happens in our case. Moreover, we show that the SOT efficiency is strongly magnetization-dependent by characterizing the current dependence of SOT efficiency and explaining the anomalous SOT switching back phenomena in the presence of a titled external field. Our results reveal the critical role of Joule heating on the dynamics of magnetic insulators and pave the way for the application of spintronic devices based on magnetic insulators.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Riverside, CA (United States)

Sponsoring Organization:: Guangdong-Hong Kong-Macao Joint Laboratory; Research Grant Council - Early Career Scheme; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1851735

Alternate ID(s):: OSTI ID: 1783339

Journal Information:: APL Materials, Journal Name: APL Materials Journal Issue: 5 Vol. 9; ISSN 2166-532X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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