# Micromagnetic simulations of Nd-Fe-B hot-deformed magnets subjected to eutectic grain boundary diffusion process

https://mdr.nims.go.jp/datasets/54187e60-1bcc-4ea4-9cbf-837ba6fa60f5

## File

- [Manuscript_revised.docx](https://mdr.nims.go.jp/filesets/eb218e22-22f2-4dbe-813d-5def2e19d876/download) ([Detail](https://mdr.nims.go.jp/filesets/eb218e22-22f2-4dbe-813d-5def2e19d876.md))

## Id

54187e60-1bcc-4ea4-9cbf-837ba6fa60f5

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-12T05:51:52.827370Z

## Updated at

2024-08-23T03:30:14.044670Z

## Published at

2024-08-23T03:30:14.451938Z

## Doi

https://doi.org/10.48505/nims.4676

## First published url

https://doi.org/10.1016/j.scriptamat.2024.116095

## Date published

2024-03-30

## Recorded date published

2024-7

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Micromagnetic simulations of Nd-Fe-B hot-deformed magnets subjected to eutectic
    grain boundary diffusion process
  title_type: original
  lang: en

## Description

- description: The grain boundary diffusion process (GBDP) is one of the most efficient
    treatments for increasing the coercivity (Hc) of Nd-Fe-B magnets. However, this
    enhancement typically occurs at the expense of remanence (Mr). In this study,
    micromagnetic simulations were performed to quantify this tradeoff in hot-deformed
    Nd-Fe-B magnets subjected to the GBDP using a Nd-based eutectic alloy. The GBDP
    was imitated in a series of models with a gradually increasing volume fraction
    of the infiltrated Nd-rich nonmagnetic phase. This infiltration reduced the remanence
    and grain connectivity via the remaining thin magnetic intergranular phase (IGP),
    which in turn increased the coercivity. We distinguished between the roles of
    exchange and magnetostatic interactions in this coercivity enhancement. Furthermore,
    the simulated Mr vs. Hc curves defined realistic limits for coercivity that depended
    on the IGP magnetization, which was estimated to be 0.9 ± 0.1 T by reproducing
    experimental Mr vs. Hc data from the literature.
  description_type: abstract
  lang: und

## Creator

- name: Anton Bolyachkin
  role: author
  orcid: https://orcid.org/0000-0003-0420-1806
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Ekaterina Dengina
  role: author
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Hossein Sepehri-Amin
  role: author
  orcid: https://orcid.org/0000-0002-7856-7897
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Tadakatsu Ohkubo
  role: author
  orcid: https://orcid.org/0000-0003-3548-1951
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Kazuhiro 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: Permanent magnet
  schema: not_defined
- subject: Nd-Fe-B
  schema: not_defined
- subject: Micromagnetic simulation
  schema: not_defined
- subject: Grain boundary diffusion process
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Scripta Materialia
  issn: '13596462'
  volume: '247'
  article_number: '116095'

## Conference



## Related item



## Funding

- funder_name: Japan Society for the Promotion of Science
- funder_name: Government of Japan Ministry of Education Culture Sports Science and
    Technology

## 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



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## Custom property



## Fileset

- id: eb218e22-22f2-4dbe-813d-5def2e19d876
  filename: Manuscript_revised.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 2185298
  md5: c36ea86327e2af72ef410a4e756e2d49

## Thumbnail

fileset_id: eb218e22-22f2-4dbe-813d-5def2e19d876
filename: Manuscript_revised.docx