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Controlled nonlinear magnetic damping in spin-Hall nano-devices

Author

Listed:
  • Boris Divinskiy

    (University of Muenster)

  • Sergei Urazhdin

    (Emory University)

  • Sergej O. Demokritov

    (University of Muenster)

  • Vladislav E. Demidov

    (University of Muenster)

Abstract

Large-amplitude magnetization dynamics is substantially more complex compared to the low-amplitude linear regime, due to the inevitable emergence of nonlinearities. One of the fundamental nonlinear phenomena is the nonlinear damping enhancement, which imposes strict limitations on the operation and efficiency of magnetic nanodevices. In particular, nonlinear damping prevents excitation of coherent magnetization auto-oscillations driven by the injection of spin current into spatially extended magnetic regions. Here, we propose and experimentally demonstrate that nonlinear damping can be controlled by the ellipticity of magnetization precession. By balancing different contributions to anisotropy, we minimize the ellipticity and achieve coherent magnetization oscillations driven by spatially extended spin current injection into a microscopic magnetic disk. Our results provide a route for the implementation of efficient active spintronic and magnonic devices driven by spin current.

Suggested Citation

  • Boris Divinskiy & Sergei Urazhdin & Sergej O. Demokritov & Vladislav E. Demidov, 2019. "Controlled nonlinear magnetic damping in spin-Hall nano-devices," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13246-7
    DOI: 10.1038/s41467-019-13246-7
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    Cited by:

    1. H. Merbouche & B. Divinskiy & D. Gouéré & R. Lebrun & A. El Kanj & V. Cros & P. Bortolotti & A. Anane & S. O. Demokritov & V. E. Demidov, 2024. "True amplification of spin waves in magnonic nano-waveguides," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Rouven Dreyer & Alexander F. Schäffer & Hans G. Bauer & Niklas Liebing & Jamal Berakdar & Georg Woltersdorf, 2022. "Imaging and phase-locking of non-linear spin waves," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    3. B. Divinskiy & H. Merbouche & V. E. Demidov & K. O. Nikolaev & L. Soumah & D. Gouéré & R. Lebrun & V. Cros & Jamal Ben Youssef & P. Bortolotti & A. Anane & S. O. Demokritov, 2021. "Evidence for spin current driven Bose-Einstein condensation of magnons," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    4. Haowen Ren & Xin Yu Zheng & Sanyum Channa & Guanzhong Wu & Daisy A. O’Mahoney & Yuri Suzuki & Andrew D. Kent, 2023. "Hybrid spin Hall nano-oscillators based on ferromagnetic metal/ferrimagnetic insulator heterostructures," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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