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Title: Composition dependence of spin-orbit torques in PtRh/ferromagnet heterostructures
Authors: Shi, Guoyi
Liu, Enlong 
Yang, Qu
Liu, Yakun
Cai, Kaiming 
Yang, Hyunsoo 
Issue Date: 1-Apr-2021
Publisher: American Institute of Physics Inc.
Citation: Shi, Guoyi, Liu, Enlong, Yang, Qu, Liu, Yakun, Cai, Kaiming, Yang, Hyunsoo (2021-04-01). Composition dependence of spin-orbit torques in PtRh/ferromagnet heterostructures. APL Materials 9 (4) : 41105. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: We experimentally study the spin-orbit torque (SOT) in PtRh/heterostructures by varying the composition of PtRh alloy. By performing dc-biased spin-torque ferromagnetic resonance and second-harmonic measurements in PtxRh1?x/ferromagnet heterostructures, we find that the effective damping-like spin-torque efficiency and spin Hall conductivity are 0.18 and 3.8 × 105 ?/2e ??1 m?1 for Pt0.9Rh0.1, respectively, with a low resistivity of 46.9 µ? cm. Furthermore, current induced SOT switching in PtRh/Co is investigated. The critical current density for SOT switching decreases with an increase in the Rh composition of the PtRh alloy, which can be understood by domain wall assisted switching. Due to a large spin Hall conductivity, a relatively low resistivity, and sustainability of the high temperature process, the PtRh alloy could be an attractive spin source for SOT applications. © 2021 Author(s).
Source Title: APL Materials
ISSN: 2166-532X
DOI: 10.1063/5.0046766
Rights: Attribution 4.0 International
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