# Magnetic correlations and crystal structure changes in Fe- and Ni-substituted <math>  <msub>    <mi>ErCo</mi>    <mn>2</mn>  </msub></math> with reversible giant magnetocaloric effect

https://mdr.nims.go.jp/datasets/a134fc3a-906a-424b-a791-a2231c532ff9

## File

- [ArticleDraft_ErCo2_Submission3_20250625.pdf](https://mdr.nims.go.jp/filesets/bb86522b-6c42-4bc1-a5f1-e62a587e7d0f/download) ([Detail](https://mdr.nims.go.jp/filesets/bb86522b-6c42-4bc1-a5f1-e62a587e7d0f.md))

## Id

a134fc3a-906a-424b-a791-a2231c532ff9

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-07-28T05:26:31.346725Z

## Updated at

2025-07-29T23:30:20.087768Z

## Published at

2025-07-29T23:16:41.072491Z

## Doi

https://doi.org/10.48505/nims.5614

## First published url

https://doi.org/10.1103/6lt2-4pwb

## Date published

2025-07-23

## Recorded date published

2025-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Magnetic correlations and crystal structure changes in Fe- and Ni-substituted
    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>ErCo</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
    with reversible giant magnetocaloric effect
  title_type: original
  lang: en

## Description

- description: In this study the microscopic magnetic correlations and crystal lattice
    distortions are investigated by neutron and synchrotron X-ray diffraction, as
    well as AC susceptibility measurements. The results indicated that in contrast
    to the previous study, the cu- bic to rhombohedral structure change was not suppressed,
    though the way the unit cell expansion occurred did change. No significant changes
    were observed in the magnetic long range order and crystal lattice symmetry, which
    still formed a ferrimagnetic and rhombohedral crystal structure below the phase
    transition temperature (TC) for all substitutions as well as pure ErCo2. However,
    an increase in magnetic short range correlations above TC, which is strongly correlated
    with the entropy change and the dynamic AC susceptibility, was detected only in
    the substituted samples. Unlike pure ErCo2, the nucleation of the local ferrimagnetic
    clusters above TC occurs in the sub- stituted samples, which significantly reduces
    the energy barrier between the higher temperature cubic phase and the lower temperature
    rhombohedral phase. It is concluded that the reduction of the energy barrier due
    to the development of short range order induced by chemical substitution at temperatures
    above TC is possibly the origin of the significant change in the nature of the
    phase transition in ErCo2.
  description_type: abstract
  lang: und

## Creator

- name: Simon Rosenqvist Larsen
  role: author
  orcid: https://orcid.org/0000-0002-8107-4110
- name: Noriki Terada
  role: author
  orcid: https://orcid.org/0000-0002-8676-5586
- name: Xin Tang
  role: author
  orcid: https://orcid.org/0000-0001-6762-6145
- name: Hiroaki Mamiya
  role: author
- name: Yusuke Nambu
  role: author
  orcid: https://orcid.org/0000-0003-1167-7124
- name: Daisuke Okuyama
  role: author
  orcid: https://orcid.org/0000-0001-8709-5177
- name: Hossein Sepehri-Amin
  role: author
  orcid: https://orcid.org/0000-0002-7856-7897

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: magnetocaloric effect
  schema: not_defined
- subject: neutron diffraction
  schema: not_defined

## Rights

- description: "©2025 American Physical Society."
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: '24699950'
  volume: '112'
  issue: '1'
  article_number: '014443'

## Conference



## Related item



## Funding

- identifier: 22H00297
  funder_name: Japan Society for the Promotion of Science
- identifier: JP24K00572
  funder_name: Japan Society for the Promotion of Science
- identifier: JP22H05145
  funder_name: Japan Society for the Promotion of Science
- identifier: JPJSJRP20221608
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJFR202V
  funder_name: Japan Science and Technology Agency
- funder_name: National Institute for Materials Science

## 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: bb86522b-6c42-4bc1-a5f1-e62a587e7d0f
  filename: ArticleDraft_ErCo2_Submission3_20250625.pdf
  content_type: application/pdf
  size: 5575350
  md5: bfe0a2daf2364533eb456e59cedac7a2

## Thumbnail

fileset_id: bb86522b-6c42-4bc1-a5f1-e62a587e7d0f
filename: ArticleDraft_ErCo2_Submission3_20250625.pdf