# High coercivity permanent magnets without reliance on scarce elements

https://mdr.nims.go.jp/datasets/bdaf356f-fb46-4f87-bfab-3ba00b07c68d

## File

- [Review paper_Final.docx](https://mdr.nims.go.jp/filesets/6ac693cb-a572-420e-b873-a972682b3e3a/download) ([Detail](https://mdr.nims.go.jp/filesets/6ac693cb-a572-420e-b873-a972682b3e3a.md))

## Id

bdaf356f-fb46-4f87-bfab-3ba00b07c68d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-09-04T05:12:29.071021Z

## Updated at

2025-07-31T23:30:41.727540Z

## Published at

2025-07-31T23:16:52.902020Z

## Doi

https://doi.org/10.48505/nims.4727

## First published url

https://doi.org/10.11470/oubutsu.93.8_466

## Date published



## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: High coercivity permanent magnets without reliance on scarce elements
  title_type: original
  lang: en

## Description

- description: "抄録\r\nPermanent magnets are known as one of the enablers for achieving
    carbon neutrality due to their applications in green energy conversion. With the
    growing demand for permanent magnets, concerns arise regarding element criticality
    while maintaining the magnets’ functionality. Coercivity (resistance to magnetization
    reversal) is one of the most important extrinsic magnetic properties of permanent
    magnets, affecting their functionality. To date, coercivity enhancement has mostly
    been achieved by the addition of scarce elements, e.g. Dy is often used in Nd2Fe14B
    type permanent magnets, exacerbating the materials’ criticality. This review shows
    how fundamental research has provided alternative strategies for coercivity enhancement
    without reliance on scarce elements. Specifically, we showcase microstructural
    engineering, in particular fine-tuning the composition of grain boundary phase
    and its coverage of the matrix grains in the Nd2Fe14B type permanent magnets,
    has led to the development of high coercivity without reliance on Dy. Furthermore,
    based on micromagnetic simulations, we also discuss further microstructural modifications
    in the Nd2Fe14B type magnets required to push coercivity towards its physical
    limit. Lastly, we will demonstrate how the principles of microstructure engineering
    can be extended to improve the coercivity of other permanent magnets such as SmCo5-type
    and recently-developed SmFe12-based sintered magnets."
  description_type: abstract
  lang: eng

## Creator

- name: Sepehri-Amin H.
  role: author
  orcid: https://orcid.org/0000-0002-7856-7897
- name: Bolyachkin A.
  role: author
  orcid: https://orcid.org/0000-0003-0420-1806
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Tang Xin
  role: author
  orcid: https://orcid.org/0000-0001-6762-6145
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: 公益社団法人 応用物理学会

## Managing organization



## Keyword

- subject: Permanent Magnets
  schema: not_defined
- subject: Coercivity
  schema: not_defined
- subject: Microstructure
  schema: not_defined

## Rights

- description: Author's final manuscript file is submitted and it is not in copyright
    of journal
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-08-01
end_date: 2025-08-01

## Journal

- title: 応用物理
  issn: '03698009'
  volume: '93'
  issue: '8'
  start_page: 466
  end_page: 471

## Conference



## Related item



## Funding



## 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: 6ac693cb-a572-420e-b873-a972682b3e3a
  filename: Review paper_Final.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 3194403
  md5: 06c7f5ddda301d07e23b5f9203dc09ea

## Thumbnail

fileset_id: 6ac693cb-a572-420e-b873-a972682b3e3a
filename: Review paper_Final.docx