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Title: Thickness dependence of spin Hall magnetoresistance in FeMn/Pt bilayers
Authors: Yang, Y 
Xu, Y 
Yao, K 
Wu, Y 
Keywords: Binary alloys
Heavy metals
Iron alloys
Manganese alloys
Bilayer systems
FeMn thin films
Hall magnetoresistance
Non-monotonic dependence
Spin-diffusion length
Thickness dependence
Platinum alloys
Issue Date: 2016
Citation: Yang, Y, Xu, Y, Yao, K, Wu, Y (2016). Thickness dependence of spin Hall magnetoresistance in FeMn/Pt bilayers. AIP Advances 6 (6) : 65203. ScholarBank@NUS Repository.
Abstract: We investigated spin Hall magnetoresistance in FeMn/Pt bilayers, which was found to be one order of magnitude larger than that of heavy metal and insulating ferromagnet or antiferromagnet bilayer systems, and comparable to that of NiFe/Pt bilayers. The spin Hall magnetoresistance shows a non-monotonic dependence on the thicknesses of both FeMn and Pt. The former can be accounted for by the thickness dependence of net magnetization in FeMn thin films, whereas the latter is mainly due to spin accumulation and diffusion in Pt. Through analysis of the Pt thickness dependence, the spin Hall angle, spin diffusion length of Pt and the real part of spin mixing conductance were determined to be 0.2, 1.1 nm, and 5.5 × 1014 Ω-1m-2, respectively. The results corroborate the spin orbit torque effect observed in this system recently. © 2016 Author(s).
Source Title: AIP Advances
ISSN: 2158-3226
DOI: 10.1063/1.4953396
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