Current-induced spin torque resonance of a magnetic insulator

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2015
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Schreier, Michael
Chiba, Takahiro
Niedermayr, Arthur
Lotze, Johannes
Huebl, Hans
Geprägs, Stephan
Takahashi, Saburo
Bauer, Gerrit E. W.
Gross, Rudolf
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Physical Review B. American Physical Society (APS). 2015, 92(14), 144411. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.92.144411
Zusammenfassung

We report the observation of current-induced spin torque resonance in yttrium iron garnet/platinum bilayers. An alternating charge current at GHz frequencies in the platinum gives rise to dc spin pumping and spin Hall magnetoresistance rectification voltages, induced by the Oersted fields of the ac current and the spin Hall effect-mediated spin transfer torque. In ultrathin yttrium iron garnet films, we observe spin transfer torque actuated magnetization dynamics which are significantly larger than those generated by the ac Oersted field. Spin transfer torques thus efficiently couple charge currents and magnetization dynamics also in magnetic insulators, enabling charge current-based interfacing of magnetic insulators with microwave devices.

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ISO 690SCHREIER, Michael, Takahiro CHIBA, Arthur NIEDERMAYR, Johannes LOTZE, Hans HUEBL, Stephan GEPRÄGS, Saburo TAKAHASHI, Gerrit E. W. BAUER, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, 2015. Current-induced spin torque resonance of a magnetic insulator. In: Physical Review B. American Physical Society (APS). 2015, 92(14), 144411. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.92.144411
BibTex
@article{Schreier2015Curre-52425,
  year={2015},
  doi={10.1103/PhysRevB.92.144411},
  title={Current-induced spin torque resonance of a magnetic insulator},
  number={14},
  volume={92},
  issn={2469-9950},
  journal={Physical Review B},
  author={Schreier, Michael and Chiba, Takahiro and Niedermayr, Arthur and Lotze, Johannes and Huebl, Hans and Geprägs, Stephan and Takahashi, Saburo and Bauer, Gerrit E. W. and Gross, Rudolf and Goennenwein, Sebastian T. B.},
  note={Article Number: 144411}
}
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