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Spin Pumping with Coherent Elastic Waves

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2012

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Weiler, Mathias
Huebl, Hans
Goerg, F. S.
Czeschka, Franz D.
Gross, Rudolf

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https://doi.org/10.1103/PhysRevLett.108.176601
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http://arxiv.org/abs/1110.1187v2

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Physical Review Letters. American Physical Society (APS). 2012, 108(17), 176601. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.108.176601

Zusammenfassung

We show that the resonant coupling of phonons and magnons can be exploited to generate spin currents at room temperature. Surface acoustic wave pulses with a frequency of 1.55 GHz and duration of 300 ns provide coherent elastic waves in a ferromagnetic thin-film-normal-metal (Co/Pt) bilayer. We use the inverse spin Hall voltage in the Pt as a measure for the spin current and record its evolution as a function of time and external magnetic field magnitude and orientation. Our experiments show that a spin current is generated in the exclusive presence of a resonant elastic excitation. This establishes acoustic spin pumping as a resonant analogue to the spin Seebeck effect.

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ISO 690WEILER, Mathias, Hans HUEBL, F. S. GOERG, Franz D. CZESCHKA, Rudolf GROSS, Sebastian T. B. GOENNENWEIN, 2012. Spin Pumping with Coherent Elastic Waves. In: Physical Review Letters. American Physical Society (APS). 2012, 108(17), 176601. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.108.176601
BibTex
@article{Weiler2012-04-27Pumpi-52354,
  year={2012},
  doi={10.1103/PhysRevLett.108.176601},
  title={Spin Pumping with Coherent Elastic Waves},
  number={17},
  volume={108},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Weiler, Mathias and Huebl, Hans and Goerg, F. S. and Czeschka, Franz D. and Gross, Rudolf and Goennenwein, Sebastian T. B.},
  note={Article Number: 176601}
}
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