# Transmission electron microscopy image based micromagnetic simulations for optimizing nanostructure of FePt-X heat-assisted magnetic recording media

https://mdr.nims.go.jp/datasets/14899109-aaeb-4a87-a4f9-f158a1ad1a36

## File

- [manuscript.docx](https://mdr.nims.go.jp/filesets/ddc91ae7-1f37-4b8c-b674-e84cc7d636fd/download) ([Detail](https://mdr.nims.go.jp/filesets/ddc91ae7-1f37-4b8c-b674-e84cc7d636fd.md))

## Id

14899109-aaeb-4a87-a4f9-f158a1ad1a36

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-10-11T03:50:47.193928Z

## Updated at

2024-10-15T07:30:23.270788Z

## Published at

2024-10-15T07:30:23.507153Z

## Doi

https://doi.org/10.48505/nims.4849

## First published url

https://doi.org/10.1016/j.actamat.2022.117744

## Date published

2022-02-09

## Recorded date published

2022-4

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Transmission electron microscopy image based micromagnetic simulations for
    optimizing nanostructure of FePt-X heat-assisted magnetic recording media
  title_type: original
  lang: en

## Description

- description: The areal density of the heat-assisted magnetic recording (HAMR) technology
    has a potential to reach 4 Tb/in2. However, the bimodal grain size distribution
    and structural defects that are unavoidable in actual FePt-X nanogranular media
    must be minimized for further reduction of a jitter noise. Here we report transmission
    electron microscopy (TEM) image based micromagnetic simulations of the FePt-X
    nanogranular media in order to elucidate the role of structural defects such as
    [200] misalignment and {111} twins on the magnetic properties. Micromagnetic approximation
    of experimental out-of-plane hysteresis loops allows to evaluate micromagnetic
    parameters and volume fractions of the defects in MgO(6 nm)/FePt-BN(1 nm)/FePt-(BN,C,SiO2)(7
    nm) granular thin films. Synchrotron XRD of the films validated that the structural
    defects can be accurately evaluated by the proposed approach. The developed TEM
    image based micromagnetic simulations can directly link nanostructure of the FePt-X
    media with magnetic properties, boosting not only the optimization of the HAMR
    media but also a design of magnetic nanomaterials in general.
  description_type: abstract
  lang: und

## Creator

- 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: I. Suzuki
  role: author
  orcid: https://orcid.org/0000-0002-8932-8226
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: H. Tajiri
  role: author
- 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
- name: K. Srinivasan
  role: author
- name: H. Ho
  role: author
- name: H. Yuan
  role: author
- name: T. Seki
  role: author
- name: A. Ajan
  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

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: FePt media
  schema: not_defined
- subject: Micromagnetic simulations
  schema: not_defined

## Rights

- description: "© 2022. This manuscript version is made available under the CC-BY-NC-ND
    4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/"
  identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '227'
  article_number: '117744'

## Conference



## Related item



## Funding

- identifier: JP18H03787
  funder_name: Japan Society for the Promotion of Science
- identifier: JP19K05257
  funder_name: Japan Society for the Promotion of Science

## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: ddc91ae7-1f37-4b8c-b674-e84cc7d636fd
  filename: manuscript.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 5340421
  md5: 1f20d7513f92d5c47bec501cfc95e2e6

## Thumbnail

fileset_id: ddc91ae7-1f37-4b8c-b674-e84cc7d636fd
filename: manuscript.docx