# Dual-layer FePt-C granular media for multi-level heat-assisted magnetic recording

https://mdr.nims.go.jp/datasets/d9be59ea-8dcc-46a1-bb1a-625314cfc0a3

## File

- [論文1 Tozman Acta Mater271 119869 2024.pdf](https://mdr.nims.go.jp/filesets/860895e9-cc35-4064-8e2b-c1277c4d3672/download) ([Detail](https://mdr.nims.go.jp/filesets/860895e9-cc35-4064-8e2b-c1277c4d3672.md))

## Id

d9be59ea-8dcc-46a1-bb1a-625314cfc0a3

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-13T00:50:20.016167Z

## Updated at

2024-08-22T23:30:11.377869Z

## Published at

2024-08-22T23:30:11.829879Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2024.119869

## Date published

2024-03-24

## Recorded date published

2024-6

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Dual-layer FePt-C granular media for multi-level heat-assisted magnetic recording
  title_type: original
  lang: en

## Description

- description: 'Multi-level magnetic recording is a new concept for increasing the
    data storage capacity of hard disk drives. However, its implementation has been
    limited by a lack of suitable media capable of storing information at multiple
    levels. Herein, we overcome this problem by developing dual FePt-C nanogranular
    films separated by a Ru-C breaking layer with a cubic crystal structure. The FePt
    grains in the bottom and top layers of the developed media exhibited different
    effective magnetocrystalline anisotropies and Curie temperatures. The former is
    realized by different degrees of ordering in the L10-FePt grains, whereas the
    latter was attributed to the diffusion of Ru, thereby enabling separate magnetic
    recording on each layer under different magnetic fields and temperatures. Furthermore,
    magnetic measurements and heat-assisted magnetic recording simulations showed
    that these media enabled 3-level recording and could potentially be extended to
    4-level recording, as the ↑↓ and ↓↑ states exhibited non-zero magnetization. '
  description_type: abstract
  lang: und

## Creator

- name: P. Tozman
  role: author
- name: S. Isogami
  role: author
  orcid: https://orcid.org/0000-0001-7230-6090
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: I. Suzuki
  role: author
  orcid: https://orcid.org/0000-0002-8932-8226
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: A. Bolyachkin
  role: author
  orcid: https://orcid.org/0000-0003-0420-1806
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: H. Sepehri-Amin
  role: author
  orcid: https://orcid.org/0000-0002-7856-7897
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: S.J. Greaves
  role: author
  orcid: https://orcid.org/0000-0002-8848-0197
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: H. Suto
  role: author
  orcid: https://orcid.org/0000-0003-4387-5862
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Y. Sasaki
  role: author
  orcid: https://orcid.org/0000-0002-9192-4799
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: T.Y. Chang
  role: author
- name: Y. Kubota
  role: author
- name: P. Steiner
  role: author
- name: P.W. Huang
  role: author
- name: K. Hono
  role: author
  orcid: https://orcid.org/0000-0001-7367-0193
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Y.K. Takahashi
  role: author
  orcid: https://orcid.org/0000-0001-9197-7236
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Magnetic recording medium
  schema: not_defined
- subject: Multilevel recording
  schema: not_defined
- subject: HAMR
  schema: not_defined
- subject: Advanced characterization
  schema: not_defined
- subject: FePt dual layers
  schema: not_defined
- subject: Micromagnetic simulation
  schema: not_defined
- subject: Read/write simulation
  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: '271'
  article_number: '119869'

## Conference



## Related item



## Funding

- funder_name: Government of Japan Ministry of Education Culture Sports Science and
    Technology
- funder_name: Japan Science and Technology Agency

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 860895e9-cc35-4064-8e2b-c1277c4d3672
  filename: 論文1 Tozman Acta Mater271 119869 2024.pdf
  content_type: application/pdf
  size: 7853572
  md5: e13a702bab286f9bac1dc5c6e6ff8b5f

## Thumbnail

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filename: 論文1 Tozman Acta Mater271 119869 2024.pdf