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

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2017

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Pütter, Sabine
Geprägs, Stephan
Schlitz, Richard
Althammer, Matthias
Erb, Andreas
Gross, Rudolf

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https://doi.org/10.1063/1.4973460
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http://arxiv.org/abs/1612.08150

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Applied Physics Letters. American Institute of Physics (AIP). 2017, 110(1), 012403. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4973460

Zusammenfassung

We study the influence of the interface quality of Pt/Y3Fe5O12(111) hybrids on their spin Hall magnetoresistance. This is achieved by exposing Y3Fe5O12(111) single crystal substrates to different well-defined surface treatments prior to the Pt deposition. The quality of the Y3Fe5O12(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 Y3Fe5O12 surface.

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ISO 690PÜTTER, Sabine, Stephan GEPRÄGS, Richard SCHLITZ, Matthias ALTHAMMER, Andreas ERB, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, 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). 2017, 110(1), 012403. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4973460
BibTex
@article{Putter2017Impac-51819,
  year={2017},
  doi={10.1063/1.4973460},
  title={Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance},
  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 Goennenwein, Sebastian T. B.},
  note={Article Number: 012403}
}
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