# Thermodynamic properties of R2Fe14B (R=Dy, Nd) and dysprosium random substitution effect on coercivity in neodymium permanent magnets

https://mdr.nims.go.jp/datasets/cd675c30-a514-4ff3-80c3-ca5318e4c3b0

## File

- [J. Appl.Phys.136,033904(2024).pdf](https://mdr.nims.go.jp/filesets/e8512675-e890-4e6d-a4aa-7e246f7fa23d/download) ([Detail](https://mdr.nims.go.jp/filesets/e8512675-e890-4e6d-a4aa-7e246f7fa23d.md))

## Id

cd675c30-a514-4ff3-80c3-ca5318e4c3b0

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-07-24T03:58:13.417005Z

## Updated at

2024-07-24T07:30:21.865578Z

## Published at

2024-07-24T07:30:22.250132Z

## Doi



## First published url

https://doi.org/10.1063/5.0217917

## Date published

2024-07-21

## Recorded date published

2024-7-21

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Thermodynamic properties of R2Fe14B (R=Dy, Nd) and dysprosium random substitution
    effect on coercivity in neodymium permanent magnets
  title_type: original
  lang: en

## Description

- description: 'Neodymium (Nd) magnets (Nd2Fe14B) are key materials for achieving
    high energy conversion efficiency. The coercive forces (fields) of the magnets
    are often reinforced by adding dysprosium (Dy), especially at high temperatures.
    To understand the magnetic properties of Dy-substituted systems (Nd(1-x)Dy(x))2Fe14B,
    it is important to study those of Dy2Fe14B and Nd2Fe14B and analyze the difference
    in detail from a microscopic viewpoint. Applying a recently developed atomistic
    model approach, we investigated thermodynamic properties of these magnets. We
    studied the temperature and field dependences of the magnetizations, and anisotropy
    fields and energies. We found that the simulation results captured the characteristic
    features of the experimentally observed data. We discuss the detail with the magnetization
    profiles of the component atoms. Furthermore, we investigated the effect of Dy
    random substitution on the coercivity in two systems: one in contact with vacuum
    and the other in contact with a grain boundary phase. We found that the threshold
    fields increased almost linearly with the concentration of Dy atoms in both systems,
    which was compared to the results of the layer-by-layer substitution effect analyzed
    in our previous work. We discuss the influence of the arrangement of Dy atoms
    on coercivity enhancement.'
  description_type: abstract
  lang: und

## Creator

- name: Masamichi Nishino
  role: author
  orcid: https://orcid.org/0000-0002-2060-2303
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Hiroshi Hayasaka
  role: author
  orcid: https://orcid.org/0000-0001-5847-9948
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Seiji Miyashita
  role: author
  orcid: https://orcid.org/0000-0003-0681-3910

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: R2Fe14B
  schema: not_defined
- subject: Atomistic model
  schema: not_defined
- subject: Coercivity
  schema: not_defined
- subject: Dy substitution effect
  schema: not_defined
- subject: Thermodynamic properties
  schema: not_defined
- subject: Monte Carlo simulation
  schema: not_defined
- subject: Stochastic LLG simulation
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of Applied Physics
  issn: '00218979'
  volume: '136'
  issue: '3'
  article_number: '033904'

## Conference



## Related item



## Funding

- identifier: 24K01332
  funder_name: MEXT
  description: 保磁力理論研究の新展開：原子スケールの揺らぎを保持したマルチスケール解析法の開発

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## Fileset

- id: e8512675-e890-4e6d-a4aa-7e246f7fa23d
  filename: J. Appl.Phys.136,033904(2024).pdf
  content_type: application/pdf
  size: 2796005
  md5: 7357ed65d53a4c194b308e1b325da325

## Thumbnail

fileset_id: e8512675-e890-4e6d-a4aa-7e246f7fa23d
filename: J. Appl.Phys.136,033904(2024).pdf