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Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids

Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids

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ALTHAMMER, Matthias, Sibylle MEYER, Hiroyasu NAKAYAMA, Michael SCHREIER, Stephan ALTMANNSHOFER, Mathias WEILER, Hans HUEBL, Stephan GEPRÄGS, Matthias OPEL, Sebastian T. B. GÖNNENWEIN, 2013. Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids. In: Physical Review B. American Physical Society (APS). 87(22), 224401. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.87.224401

@article{Althammer2013-04-23T02:35:27ZQuant-52443, title={Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids}, year={2013}, doi={10.1103/PhysRevB.87.224401}, number={22}, volume={87}, issn={2469-9950}, journal={Physical Review B}, author={Althammer, Matthias and Meyer, Sibylle and Nakayama, Hiroyasu and Schreier, Michael and Altmannshofer, Stephan and Weiler, Mathias and Huebl, Hans and Geprägs, Stephan and Opel, Matthias and Gönnenwein, Sebastian T. B.}, note={Article Number: 224401} }

2021-01-15T07:54:48Z We experimentally investigate and quantitatively analyze the spin Hall magnetoresistance effect in ferromagnetic insulator/platinum and ferromagnetic insulator/nonferromagnetic metal/platinum hybrid structures. For the ferromagnetic insulator, we use either yttrium iron garnet, nickel ferrite, or magnetite and for the nonferromagnet, copper or gold. The spin Hall magnetoresistance effect is theoretically ascribed to the combined action of spin Hall and inverse spin Hall effect in the platinum metal top layer. It therefore should characteristically depend upon the orientation of the magnetization in the adjacent ferromagnet and prevail even if an additional, nonferromagnetic metal layer is inserted between Pt and the ferromagnet. Our experimental data corroborate these theoretical conjectures. Using the spin Hall magnetoresistance theory to analyze our data, we extract the spin Hall angle and the spin diffusion length in platinum. For a spin-mixing conductance of 4×10<sup>14</sup>Ω<sup>−1</sup>m<sup>−2</sup>, we obtain a spin Hall angle of 0.11±0.08 and a spin diffusion length of (1.5±0.5)nm for Pt in our thin-film samples. Opel, Matthias Weiler, Mathias Opel, Matthias Nakayama, Hiroyasu eng Althammer, Matthias Altmannshofer, Stephan Schreier, Michael Althammer, Matthias Huebl, Hans Nakayama, Hiroyasu Geprägs, Stephan 2021-01-15T07:54:48Z Gönnenwein, Sebastian T. B. Meyer, Sibylle Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids Weiler, Mathias Gönnenwein, Sebastian T. B. Schreier, Michael Huebl, Hans Altmannshofer, Stephan Meyer, Sibylle Geprägs, Stephan terms-of-use 2013-04-23T02:35:27Z

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