# Thermal spin-torque heat-assisted magnetic recording

https://mdr.nims.go.jp/datasets/e94e905d-0ad8-4cb5-ae18-1af1fa328d1d

## File

- [TST-HAMR media_Acta Materialia 286 (2025) 120743.pdf](https://mdr.nims.go.jp/filesets/1f06e5fd-f620-47fc-9fca-def4f3ba099d/download) ([Detail](https://mdr.nims.go.jp/filesets/1f06e5fd-f620-47fc-9fca-def4f3ba099d.md))

## Id

e94e905d-0ad8-4cb5-ae18-1af1fa328d1d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-20T03:15:33.325576Z

## Updated at

2025-02-23T13:50:01.799764Z

## Published at

2025-02-23T13:50:01.920990Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2025.120743

## Date published

2025-01-13

## Recorded date published

2025-3

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Thermal spin-torque heat-assisted magnetic recording
  title_type: original
  lang: en

## Description

- description: 'To achieve higher recording density with lower power consumption than
    the current heat-assisted magnetic recording (HAMR) for next-generation, a more
    efficient writing with less laser power would be indispensable. An advanced HAMR
    concept is developed to address such specification, and the write ability has
    been demonstrated in multilayer media stacks comprising the core structures of
    antiferromagnetic MnPt and ferromagnetic FePt layers with the magnetic easy axis
    oriented perpendicular to the film plane. The concept is based on two distinct
    switching mechanisms: thermally activated (TA) and spin-transfer-torque (STT)
    assisted magnetization switching. The latter is driven by an out-of-plane temperature
    gradient (ΔT) in the MnPt/FePt multilayer which is referred as thermal spin-torque
    (TST) HAMR media. Pump-probe measurements reveal significant magnetic coercivity
    (Hc) modulation by ΔT at the local magnetization of the FePt layer. The hybrid
    mechanism with TA and STT can be separated by sweeping the delay time between
    the pump and probe laser pulses, and it is found that the STT dominates the mechanism
    for Hc modulation in the short delay time regime. Furthermore, the modulation
    of Hc of the FePt layer is demonstrated to be dependent on the magnitude and the
    direction of steady state ΔT. These results suggest that lower laser power consumption
    is achievable owing to the contribution of STT assisted switching in the TST-HAMR
    media.'
  description_type: abstract
  lang: und

## Creator

- name: S. Isogami
  role: author
  orcid: https://orcid.org/0000-0001-7230-6090
- name: Y. Sasaki
  role: author
  orcid: https://orcid.org/0000-0002-9192-4799
- name: Y. Fan
  role: author
- name: Y. Kubota
  role: author
- name: J. Gadbois
  role: author
- name: K. Hono
  role: author
  orcid: https://orcid.org/0000-0001-7367-0193
- name: Y.K. Takahashi
  role: author
  orcid: https://orcid.org/0000-0001-9197-7236

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: HAMR
  schema: not_defined
- subject: Spin torque
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '286'
  article_number: '120743'

## Conference



## Related item



## Funding

- identifier: JPMJC22C3
  funder_name: Core Research for Evolutional Science and Technology
- identifier: 23K22803
  funder_name: Japan Society for the Promotion of Science

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## Fileset

- id: 1f06e5fd-f620-47fc-9fca-def4f3ba099d
  filename: TST-HAMR media_Acta Materialia 286 (2025) 120743.pdf
  content_type: application/pdf
  size: 5289481
  md5: 2c89dae541adebb80758d8415b2306d9

## Thumbnail

fileset_id: 1f06e5fd-f620-47fc-9fca-def4f3ba099d
filename: TST-HAMR media_Acta Materialia 286 (2025) 120743.pdf