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Yttrium Iron Garnet Thickness Influence on the Spin Pumping in the Bulk Acoustic Wave Resonator

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Abstract

The features of phonon–magnon interconversion in acoustic resonator determine the efficiency of spin pumping from YIG into Pt that may be detected electrically through the inverse spin Hall effect (ISHE). Based on the methods developed in previous works for calculating resonator structures with a piezoelectric (ZnO) and a magnetoelastic layer in contact with the heavy metal (YIG/Pt), we present the results of numerical calculations of YIG film thickness influence on acoustically driven spin waves. We obtain some YIG film thickness regions with various behavior of dc ISHE voltage UISHE. At micron and submicron thicknesses, the higher spin wave resonance (SWR) modes (both even and odd) can be generated with efficiency comparable and even exceeding that of the main mode. The absolute maximum of UISHE is achieved at the thickness about s1 ≈ 208 nm under the excitation of the first SWR.

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ACKNOWLEDGMENTS

This work was carried out within the framework of the state task and partially was supported by grant 17-07-01498 from the Russian Foundation for Basic Research.

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Authors and Affiliations

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

    S. G. Alekseev & N. I. Polzikova

  2. Fryazino Branch Kotel’nikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, 141190, Fryazino, Moscow oblast, Russia

    A. O. Raevskiy

Authors
  1. S. G. Alekseev
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  2. N. I. Polzikova
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  3. A. O. Raevskiy
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Correspondence to S. G. Alekseev.

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Alekseev, S.G., Polzikova, N.I. & Raevskiy, A.O. Yttrium Iron Garnet Thickness Influence on the Spin Pumping in the Bulk Acoustic Wave Resonator. J. Commun. Technol. Electron. 64, 1318–1322 (2019). https://doi.org/10.1134/S1064226919110020

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