# Experimental determination of nanoscale thermal transport properties in heat-assisted magnetic recording media using step-by-step time-domain thermoreflectance method

https://mdr.nims.go.jp/datasets/6d793167-7f74-4b6f-93c5-b1a387d24f7a

## File

- [HAMR_TDTR_Hasegawa_reviewed_manuscript.docx](https://mdr.nims.go.jp/filesets/9a34962b-e784-4640-b629-62c5f82ed375/download) ([Detail](https://mdr.nims.go.jp/filesets/9a34962b-e784-4640-b629-62c5f82ed375.md))

## Id

6d793167-7f74-4b6f-93c5-b1a387d24f7a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-06-08T12:38:52.457919Z

## Updated at

2026-06-09T02:44:28.913906Z

## Published at

2026-06-09T06:25:48.237747Z

## Doi

https://doi.org/10.48505/nims.6327

## First published url

https://doi.org/10.1063/5.0339978

## Date published

2026-06-01

## Recorded date published

2026-6-1

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Experimental determination of nanoscale thermal transport properties in heat-assisted
    magnetic recording media using step-by-step time-domain thermoreflectance method
  title_type: original
  lang: en

## Description

- description: Heat-assisted magnetic recording (HAMR) enables ultra-high areal density
    by locally heating magnetic recording media with high magnetic anisotropy, but
    the writing performance critically depends on the behavior of heat flow in its
    complex multilayer structure. In this work, we establish an experiment-informed
    approach that combines time-domain thermoreflectance (TDTR) with a step-by-step
    fitting strategy to extract the thermal conductivities and interfacial thermal
    resistances in HAMR media. These experimentally determined properties are directly
    implemented in finite-element method simulations, which show good agreement with
    reported spin-stand measurements. The TDTR-based experiment-informed modeling
    established in this study reliably describes a device-level HAMR behavior and
    provides a quantitative guidance for recording media design.
  description_type: abstract
  lang: und

## Creator

- name: Kota Hasegawa
  role: author
  orcid: https://orcid.org/0009-0008-3508-1740
- name: Takamasa Hirai
  role: author
  orcid: https://orcid.org/0000-0002-5577-8018
- name: Takayuki Fukushima
  role: author
- name: Fuyuki Ando
  role: author
  orcid: https://orcid.org/0009-0003-7789-8170
- name: Naoki Takahara
  role: author
- name: Ken-ichi Uchida
  role: author
  orcid: https://orcid.org/0000-0001-7680-3051

## Contact agent



## Publisher

organization: AIP Publishing
ror: https://ror.org/

## Managing organization



## Keyword

- subject: Time-domain thermoreflectance
  schema: not_defined
- subject: Heat-assisted magnetic recording
  schema: not_defined

## Rights

- description: 'This article may be downloaded for personal use only. Any other use
    requires prior permission of the author and AIP Publishing. This article appeared
    in Kota Hasegawa, Takamasa Hirai, Takayuki Fukushima, Fuyuki Ando, Naoki Takahara,
    Ken-ichi Uchida; Experimental determination of nanoscale thermal transport properties
    in heat-assisted magnetic recording media using step-by-step time-domain thermoreflectance
    method. Appl. Phys. Lett. 1 June 2026; 128 (22): 222201 and may be found at https://doi.org/10.1063/5.0339978.'
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Applied Physics Letters
  issn: '00036951'
  volume: '128'
  issue: '22'
  article_number: '222201'

## Conference



## Related item



## Funding

- identifier: JPMJER2201
  funder_name: Japan Science and Technology Agency
- identifier: 25K17940
  funder_name: Japan Society for the Promotion of Science

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## Fileset

- id: 9a34962b-e784-4640-b629-62c5f82ed375
  filename: HAMR_TDTR_Hasegawa_reviewed_manuscript.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 864495
  md5: c739fd3775498378edc2088a32323963

## Thumbnail

fileset_id: 9a34962b-e784-4640-b629-62c5f82ed375
filename: HAMR_TDTR_Hasegawa_reviewed_manuscript.docx