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We experimentally study the magnetization dynamics of an all-in-plane spin-torque oscillator (AIP-STO) by using injection locking to an external microwave magnetic field. The AIP-STO exhibits multiple frequency signals corresponding not only to the oscillation frequencies of the magnetic layers but also to the difference between these frequencies. The oscillation frequency is identified based on the principle that injection locking occurs only to the signal corresponding to the magnetization oscillation. We also analyze the magnetization dynamics during injection locking by micromagnetic simulations. The results demonstrate that injection locking is a powerful tool for elucidating the oscillation of the AIP-STO.

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• In Copyright
  

  This is an author-created, un-copyedited version of an article accepted for publication/published in Applied Physics Express. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or
  any version derived from it. The Version of Record is available online at https://doi.org/10.35848/1882-0786/abf667.

Keyword: spin-torque oscillator, injection locking, spin-transfer torque, microwave-assisted magnetic recording , micro magnetic simulation

Date published: 2021-05-01

Publisher: IOP Publishing

Journal:

• Applied Physics Express (ISSN: 18820778) vol. 14 issue. 5 p. 53001-53001

Funding:

• JSPS JP19K05257 (Design and development of spin-torque-oscillator and recording media for microwave assisted magnetic recording)
• ASRC

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4560

First published URL: https://doi.org/10.35848/1882-0786/abf667

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Updated at: 2024-06-28 16:30:23 +0900

Published on MDR: 2024-06-28 16:30:23 +0900