# Thermophysical characterization of amorphous NiTa thin films for heat-assisted magnetic recording using frequency-domain thermoreflectance

https://mdr.nims.go.jp/datasets/914b538f-eca0-4505-9a5d-bb9e7ad18284

## File

- [Manuscript_clean.pdf](https://mdr.nims.go.jp/filesets/ecdcd15b-3f26-429b-b520-df6b842daecb/download) ([Detail](https://mdr.nims.go.jp/filesets/ecdcd15b-3f26-429b-b520-df6b842daecb.md))

## Id

914b538f-eca0-4505-9a5d-bb9e7ad18284

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-09-30T23:15:43.433504Z

## Updated at

2026-09-30T23:47:39.704505Z

## Published at

2026-10-01T01:41:00.016188Z

## Doi

https://doi.org/10.48505/nims.8633

## First published url

https://doi.org/10.1063/5.0344300

## Date published

2026-09-21

## Recorded date published

2026-9-21

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Thermophysical characterization of amorphous NiTa thin films for heat-assisted
    magnetic recording using frequency-domain thermoreflectance
  title_type: original
  lang: en

## Description

- description: The rapid global growth in data volume has intensified the need to
    increase the recording density of hard disk drives (HDDs) while reducing storage
    costs. Heat-assisted magnetic recording (HAMR), a next-generation HDD technology
    based on laser-induced heating, requires accurate thermal design of the recording
    medium for high performance. This study examines the thermophysical properties
    of amorphous NiTa, a candi- date material for heat sinks and adhesion layers in
    HAMR devices. Frequency-domain thermoreflectance measurements were performed on
    NiTa films with thicknesses ranging from 5 to 500 nm. The volumetric heat capacity
    was first determined using sufficiently thick samples, after which the effective
    thermal conductivity was measured across the full thickness range. The measured
    values, which include interfacial contributions from the glass substrate and aluminum
    transducer, were analyzed using a series resistor model. Fitting across all thicknesses
    yields a thermal con- ductivity of 6:8 6 0:3 (W m−1 K−1) for NiTa. The results
    indicate that the thermal conductivity remains practically independent of film
    thickness, consistent with typical transport characteristics of amorphous materials.
    Furthermore, the thermal conductivity of NiTa thin films is one to two orders
    of magnitude lower than that of representative crystalline metallic materials.
  description_type: abstract
  lang: und

## Creator

- name: Yasuaki Ikeda
  role: author
  orcid: https://orcid.org/0009-0007-4612-6468
- name: Yuki Akura
  role: author
  orcid: https://orcid.org/0000-0002-2747-9256
- name: Ryota Takechi
  role: author
  orcid: https://orcid.org/0009-0008-5132-7245
- name: Yukiko K. Takahashi
  role: author
  orcid: https://orcid.org/0000-0001-9197-7236
- name: Jun Hirotani
  role: author
  orcid: https://orcid.org/0000-0003-2054-1712

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: HAMR
  schema: not_defined
- subject: frequency-domain thermoreflectance
  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 Yasuaki Ikeda, Yuki Akura, Ryota Takechi, Yukiko K. Takahashi, Jun Hirotani;
    Thermophysical characterization of amorphous NiTa thin films for heat-assisted
    magnetic recording using frequency-domain thermoreflectance. Appl. Phys. Lett.
    21 September 2026; 129 (12): 122201 and may be found at https://doi.org/10.1063/5.0344300.'
  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: '129'
  issue: '12'
  article_number: '122201'

## Conference



## Related item



## Funding

- identifier: JPMJPR20B6
  funder_name: Precursory Research for Embryonic Science and Technology
- identifier: JPMJCR21C1
  funder_name: Core Research for Evolutional Science and Technology
- identifier: 23K26139
  funder_name: Japan Society for the Promotion of Science
- identifier: 23K04361
  funder_name: Japan Society for the Promotion of Science
- identifier: 24K21577
  funder_name: Japan Society for the Promotion of Science
- identifier: 26K21737
  funder_name: Japan Society for the Promotion of Science
- identifier: 24KJ1526
  funder_name: Japan Society for the Promotion of Science
- identifier: 26KJ1583
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMXP1122715503
  funder_name: MEXT Program Data Creation and Utilization-Type Material Research and
    Development Project

## Instrument



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## Fileset

- id: ecdcd15b-3f26-429b-b520-df6b842daecb
  filename: Manuscript_clean.pdf
  content_type: application/pdf
  size: 898298
  md5: 712931753c2bc41310804c23e2a96599

## Thumbnail

fileset_id: ecdcd15b-3f26-429b-b520-df6b842daecb
filename: Manuscript_clean.pdf