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Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance

Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance

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PÜTTER, Sabine, Stephan GEPRÄGS, Richard SCHLITZ, Matthias ALTHAMMER, Andreas ERB, Rudolf GROSS, Sebastian T. B. GÖNNENWEIN, 2017. Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance. In: Applied Physics Letters. American Institute of Physics (AIP). 110(1), 012403. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4973460

@article{Putter2017Impac-51819, title={Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance}, year={2017}, doi={10.1063/1.4973460}, number={1}, volume={110}, issn={0003-6951}, journal={Applied Physics Letters}, author={Pütter, Sabine and Geprägs, Stephan and Schlitz, Richard and Althammer, Matthias and Erb, Andreas and Gross, Rudolf and Gönnenwein, Sebastian T. B.}, note={Article Number: 012403} }

Pütter, Sabine Gross, Rudolf Pütter, Sabine Schlitz, Richard Gönnenwein, Sebastian T. B. 2020-11-17T10:42:13Z Erb, Andreas Geprägs, Stephan eng Gönnenwein, Sebastian T. B. Geprägs, Stephan 2017 terms-of-use Erb, Andreas We study the influence of the interface quality of Pt/Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>(111) hybrids on their spin Hall magnetoresistance. This is achieved by exposing Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>(111) single crystal substrates to different well-defined surface treatments prior to the Pt deposition. The quality of the Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>(YIG) surface, the Pt/YIG interface and the Pt layer is monitored in-situ by reflection high-energy electron diffraction and Auger electron spectroscopy as well as ex-situ by atomic force microscopy and X-ray diffraction. To identify the impact of the different surface treatments on the spin Hall magnetoresistance, angle-dependent magnetoresistance measurements are carried out at room temperature. The largest spin Hall magnetoresistance is found in Pt/YIG fabricated by a two-step surface treatment consisting of a “piranha” etch process followed by an annealing step at 500 °C in pure oxygen atmosphere. Our data suggest that the small spin Hall magnetoresistance in Pt/YIG without any surface treatments of the YIG substrate prior to Pt deposition is caused by a considerable carbon agglomeration at the Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> surface. Althammer, Matthias Schlitz, Richard Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance Gross, Rudolf 2020-11-17T10:42:13Z Althammer, Matthias

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