# FePt磁気記録媒体研究におけるフェーズフィールド法の活用

https://mdr.nims.go.jp/datasets/19450158-a029-4c4d-8388-12b84d121bee

## File

- [まぐね原稿_松岡.docx](https://mdr.nims.go.jp/filesets/cf03c215-2663-4868-b477-dca126962b98/download) ([Detail](https://mdr.nims.go.jp/filesets/cf03c215-2663-4868-b477-dca126962b98.md))

## Id

19450158-a029-4c4d-8388-12b84d121bee

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-04-23T05:47:26.860269Z

## Updated at

2026-04-30T03:01:11.491392Z

## Published at

2026-05-01T01:24:34.072496Z

## Doi



## First published url

https://www.magnetics.jp/publication/mag_2026_21_02/

## Date published

2026-04-01

## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: FePt磁気記録媒体研究におけるフェーズフィールド法の活用
  title_type: original
  lang: ja
- title: Application of Phase-Field Method in FePt Magnetic Recording Media Research
  title_type: alternative
  lang: en

## Description

- description: The rapid growth of data‑center workloads demands higher‑density, low‑energy
    magnetic storage. L10‑FePt, with its large magnetocrystalline anisotropy, is a
    leading material for heat‑assisted magnetic recording (HAMR), but achieving the
    target 4 TBin‑2 density requires precise control of nanogranular film microstructure.
    We employed a phase‑field (PF) framework to simulate the evolution of FePt‑C films
    deposited on MgO substrates under realistic sputtering conditions. The model treats
    the local volume fractions of vacuum, L10‑FePt, carbon, and MgO as field variables
    and incorporates chemical, gradient, and elastic strain energies, the latter arising
    from the ~9 % lattice mismatch between FePt and MgO. By solving the coupled PF
    and deposition equations, we reproduced the experimentally observed 4.5 nm‑thick
    FePt‑35 % C microstructure—periodic, rounded‑square islands—over a range of carbon
    contents. Simulations reveal that elastic strain energy drives vertical island
    growth while suppressing lateral coalescence, and that carbon shortens the vertical
    transport path, further inhibiting grain coarsening. These findings identify lattice
    mismatch‑induced strain and carbon grain‑boundary engineering as key levers for
    optimizing HAMR media, and demonstrate that PF modeling can accelerate process‑material
    design for next‑generation magnetic storage.
  description_type: abstract
  lang: jpn

## Creator

- name: 松岡 佑亮
  role: author
  orcid: https://orcid.org/0000-0001-5300-1726
  organization: 物質・材料研究機構
  department: 構造材料研究センター/材料評価分野/組織熱力学グループ

## Contact agent



## Publisher

organization: 公益社団法人　日本磁気学会

## Managing organization



## Keyword

- subject: phase-field modeling
  schema: not_defined
- subject: FePt‑C nanogranular film
  schema: not_defined
- subject: L10 FePt
  schema: not_defined
- subject: heat‑assisted magnetic recording
  schema: not_defined
- subject: substrate lattice mismatch
  schema: not_defined
- subject: sputtering deposition
  schema: not_defined

## Rights

- description: "©公益社団法人  日本磁気学会  (The Magnetics Society of Japan)"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2026-04-24
end_date: 2026-05-02

## Journal

- title: まぐね
  issn: '18807208'
  volume: '21'
  issue: '2'

## Conference



## Related item



## Funding

- identifier: JPMJCR22C3
  funder_name: JST
  description: JST-CREST
- identifier: JPMXP1122715503
  funder_name: MEXT
  description: MEXT-Program

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## Fileset

- id: cf03c215-2663-4868-b477-dca126962b98
  filename: まぐね原稿_松岡.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 1352281
  md5: 78cf720deea03301180af3aba3f0bb13

## Thumbnail

fileset_id: cf03c215-2663-4868-b477-dca126962b98
filename: まぐね原稿_松岡.docx