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Influence of the Microwave Amplitude on the Spin Current at the Pt/YIG Interface

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Abstract

Spectra of spin current in a heterostructure, consisting of an epitaxial film of yttrium iron garnet Y3Fe5O12 (YIG), grown on a gadolinium gallium garnet Gd3Ga5O12 (GGG) substrate, and a platinum (Pt) film, have been investigated. The spin current, induced by microwave irradiation of the YIG film in the ferromagnetic-resonance mode and by the inverse spin Hall effect, was measured in the temperature range T = 77–300 K at the microwave power and frequency varied in the ranges of 20 μW–50 mW and 2–9 GHz, respectively, to determine the influence of spin-wave resonances in YIG on the spectral characteristics of the spin current. It is found that the spin current amplitude due to spin-wave resonances of surface spin waves becomes comparable to the contribution from the ferromagnetic resonance with an increase in the microwave power at frequencies  f = 2–3 GHz.

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ACKNOWLEDGMENTS

We are grateful to V.A. Atsarkin, V.V. Demidov, Yu.V. Kislinskii, A.M. Petrzhik, and A.V. Shadrin for fruitful discussion of the obtained results and help in carrying out measurements.

Funding

This study was performed within a State contract and supported in part by the Russian Foundation for Basic Research (project nos. 18-57-16001 and 19-07-00143). Research by A.A. Klimov was supported in part by the Russian Science Foundation (project no. 20-12-00276).

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Authors and Affiliations

  1. Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 125009, Moscow, Russia

    K. Y. Constantinian, G. A. Ovsyannikov, K. L. Stankevich, T. A. Shaikhulov, V. A. Shmakov & A. A. Klimov

  2. MIREA—Russian Technological University, 119454, Moscow, Russia

    A. A. Klimov

Authors
  1. K. Y. Constantinian
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  2. G. A. Ovsyannikov
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  3. K. L. Stankevich
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  4. T. A. Shaikhulov
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  5. V. A. Shmakov
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  6. A. A. Klimov
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Corresponding author

Correspondence to G. A. Ovsyannikov.

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The authors declare that they have no conflicts of interest.

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Translated by A. Sin’kov

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Constantinian, K.Y., Ovsyannikov, G.A., Stankevich, K.L. et al. Influence of the Microwave Amplitude on the Spin Current at the Pt/YIG Interface. Phys. Solid State 63, 1432–1436 (2021). https://doi.org/10.1134/S1063783421090201

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  • DOI: https://doi.org/10.1134/S1063783421090201

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