Journal
PHYSICAL REVIEW B
Volume 89, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.220404
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Funding
- Engineering and Physics Sciences Research Council of the UK
- Hitachi Cambridge Laboratory
- Engineering and Physical Sciences Research Council [1181293, EP/M000923/1] Funding Source: researchfish
- EPSRC [EP/M000923/1] Funding Source: UKRI
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We report on the temperature dependence of the recently discovered spin Hall magnetoresistance in a yttrium iron garnet (YIG)/platinum( Pt) thin film. The YIG/ Pt layers are an ideal choice as the combination of an insulating magnetic material and the high spin-orbit interaction in Pt gives a relatively large magnetoresistance and no electrical conduction occurs in the YIG. The temperature dependence of the magnetoresistance was measured between 1.4 K and 280 K from which the temperature dependence of the spin diffusion length in Pt has been extracted. We found that the best agreement between our data and the recently published [Chen et al., Phys. Rev. B 87, 144411 ( 2013)] theory of the spin Hall magnetoresistance is given by an assumed Elliot-Yafet mechanism of spin relaxation with temperature-independent spin Hall angle and spin mixing conductance. The best estimate for the spin diffusion length returns values between 0.57 and 3.85 nm.
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