# Determination of coupling state within a spin-torque oscillator using injection locking

https://mdr.nims.go.jp/datasets/0bb81ccb-7bef-4b4e-bc49-7767cbb7d113

## Files

- [Comm_Phys_2026_Determination of coupling state within a spin-torque oscillator using injection locking.pdf](https://mdr.nims.go.jp/filesets/312d3014-be1a-42a7-a767-31ba6aa80691/download) ([Detail](https://mdr.nims.go.jp/filesets/312d3014-be1a-42a7-a767-31ba6aa80691.md))

## Id

0bb81ccb-7bef-4b4e-bc49-7767cbb7d113

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-10T04:56:06.942476Z

## Updated at

2026-02-11T03:30:06.794267Z

## Published at

2026-02-11T01:00:15.113656Z

## Doi



## First published url

https://doi.org/10.1038/s42005-025-02469-4

## Date published

2026-01-21

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Determination of coupling state within a spin-torque oscillator using injection
    locking
  title_type: original
  lang: en

## Description

- description: "Dynamic interactions between magnetizations enable complex operations
    in spintronic devices, such as coupled oscillation in spin-torque oscillators
    (STOs). Here, we report the experimental\r\ndetermination of coupling states in
    an STO using an analysis method based on injection locking. The STO is developed
    for assisted magnetic recording in hard disk drives and exhibits coupled oscillation
    of two magnetic layers and oscillation of a single magnetic layer depending on
    bias current polarities, with the former operation improving recording performance.
    While conventional spectrum measurements yield similar peaks for both oscillations,
    our method clearly distinguishes between the coupled and single oscillation modes
    through resistancemeasurements because of the insensitivity of the coupled oscillation
    to injection locking, as supported by simulations. Our results demonstrate that
    the injection locking method provides a sensitive probe for examining coupled
    oscillation states and is widely applicable to the development of spintronic devices
    functionalized through dynamic coupling."
  description_type: abstract
  lang: und

## Creator

- name: Yuji Nakagawa
  role: author
  orcid: https://orcid.org/0000-0001-7655-5836
- name: Hirofumi Suto
  role: author
  orcid: https://orcid.org/0000-0003-4387-5862
- name: Yuya Sakuraba
  role: author
  orcid: https://orcid.org/0000-0003-4618-9550
- name: Tomoyuki Maeda
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Spin-torque oscillator
  schema: not_defined
- subject: Magnetic recording
  schema: not_defined
- subject: Spintronics
  schema: not_defined
- subject: Injection locking
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Communications Physics
  issn: '23993650'
  volume: '9'
  issue: '1'
  article_number: '17'

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## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: 312d3014-be1a-42a7-a767-31ba6aa80691
  filename: Comm_Phys_2026_Determination of coupling state within a spin-torque oscillator
    using injection locking.pdf
  content_type: application/pdf
  size: 2038823
  md5: dca71c9e9062de425a16c02673fb6168

## Thumbnail

fileset_id: 312d3014-be1a-42a7-a767-31ba6aa80691
filename: Comm_Phys_2026_Determination of coupling state within a spin-torque oscillator
  using injection locking.pdf