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Magnetostatic spin wave in a very thin CoFeB film grown on an amorphous FeZr buffer layer

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Abstract

The transmission of a magnetostatic spin wave in a very thin CoFeB film (2.3 nm) grown on an amorphous paramagnetic FeZr layer was demonstrated for the first time by using an antenna method with coplanar waveguides. The attenuation length, determined by using the difference in intensities due to a change in the distance between the antennas, was estimated to be 0.7 µm. We discuss why we are able to observe spin-wave propagation in such a thin magnetic layer, taking the low damping constant (α = 0.0027) of the CoFeB films grown on the amorphous FeZr layer and the estimated large group velocity in the CoFeB films into account.

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Authors and Affiliations

  1. Department of Display and Semiconductor Physics, Korea University, Sejong, 339-700, Korea

    Dongseok Kim

  2. Graduate School of Engineering Science, Osaka University, Osaka, 560-8531, Japan

    Kohei Nawaoka & Shinji Miwa

  3. Spin Engineering Physics Team, Korea Basic Science Institute, Daejeon, 305-806, Korea

    Seung-Young Park

  4. National Institute of Advanced Industrial Science and Technology, Spintronics Research Center, Ibaraki, 305-8568, Japan

    Yoichi Shiota

  5. Department of Physics, Inha University, Incheon, 402-751, Korea

    Chun-Yeol You, Jaehun Cho & Byung-Chan Lee

  6. Department of Display and Semiconductor Physics, Korea University, Sejong, 339-700, Korea

    Yoshishige Suzuki

  7. Graduate School of Engineering Science, Osaka University, Osaka, 560-8531, Japan

    Yoshishige Suzuki

  8. National Institute of Advanced Industrial Science and Technology, Spintronics Research Center, Ibaraki, 305-8568, Japan

    Yoshishige Suzuki

  9. Department of Display and Semiconductor Physics, Korea University, Sejong, 339-700, Korea

    Kungwon Rhie

  10. Department of Physics, Kyushu University, Fukuoka, 812-8581, Japan

    Kungwon Rhie

Authors
  1. Dongseok Kim
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  2. Kohei Nawaoka
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  3. Shinji Miwa
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  4. Seung-Young Park
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  5. Yoichi Shiota
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  6. Chun-Yeol You
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  7. Jaehun Cho
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  8. Byung-Chan Lee
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  9. Yoshishige Suzuki
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  10. Kungwon Rhie
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Corresponding author

Correspondence to Kungwon Rhie.

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These authors contributed equally to this work.

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Kim, D., Nawaoka, K., Miwa, S. et al. Magnetostatic spin wave in a very thin CoFeB film grown on an amorphous FeZr buffer layer. Journal of the Korean Physical Society 67, 906–910 (2015). https://doi.org/10.3938/jkps.67.906

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  • DOI: https://doi.org/10.3938/jkps.67.906

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