# Dynamical Simulation for Long‐Time Relaxation From Metastable States: Quantitative Estimation of Coercive Field and Relaxation Time

https://mdr.nims.go.jp/datasets/9273dfaf-9a46-43bd-bb8c-7bdbc7ba9cd7

## File

- [Nishino_EurJIC_accepted_manuscript.pdf](https://mdr.nims.go.jp/filesets/fe0bbf8f-a1bf-4f75-9d0a-516a09201295/download) ([Detail](https://mdr.nims.go.jp/filesets/fe0bbf8f-a1bf-4f75-9d0a-516a09201295.md))

## Id

9273dfaf-9a46-43bd-bb8c-7bdbc7ba9cd7

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## Visibility

open_to_public

## State

published

## Created at

2024-11-26T01:40:28.262023Z

## Updated at

2025-11-03T23:30:03.573401Z

## Published at

2025-11-01T23:22:09.784140Z

## Doi

https://doi.org/10.48505/nims.5035

## First published url

https://doi.org/10.1002/ejic.202400458

## Date published

2024-12-12

## Recorded date published

2024-12-12

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: 'Dynamical Simulation for Long‐Time Relaxation From Metastable States: Quantitative
    Estimation of Coercive Field and Relaxation Time'
  title_type: original
  lang: en

## Description

- description: 'The bistability of spin-transition materials is the origin of their
    multifunctional properties. It causes hysteresis phenomena, i. e., relaxation
    from a metastable state, of the spin (electronic) state, magnetization, etc. The
    collapse of a strong metastable state is a long-time relaxation phenomenon. To
    study such nonequilibrium dynamical phenomenon, time evolution dynamics analyses
    are important. However, it is difficult to estimate long-time relaxation phenomena
    by studying time evolution dynamics simulations due to the limitation of the simulation
    time. Furthermore, because the relaxation occurs in a stochastic process, a wide
    distribution of the relaxation time has to be considered in the analysis of the
    relaxation. To overcome these difficulties, we recently developed two methods
    for the quantitative estimation of the relaxation time from a metastable magnetic
    state and of the coercive field. In the first method, the relaxation time and
    coercive field are estimated using the survival (unrelaxed) probability of the
    ensemble of systems at each field, which extends the limitation of the simulation
    time. In the second method, they are estimated from the field-dependent free energy
    barrier obtained from the survival probability under a sweeping field. These methods
    are applicable to the estimation of the relaxation time and coercive field of
    any magnetic particles. In this paper, staring with the Stoner–Wohlfarth model,
    the difference in the characteristic features of the magnetization reversal dynamics
    between zero and finite temperatures is discussed. Then, the methods of quantitative
    estimation of the coercive field and relaxation time are presented. The estimation
    of them using a neodymium permanent magnet grain was demonstrated with the two
    methods, and the methodological features and the validity of the estimation were
    discussed. The present study has a common theme to general metastable states including
    spin transitions. '
  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: Seiji Miyashita
  role: author
  orcid: https://orcid.org/0000-0003-0681-3910

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: coercive field
  schema: not_defined
- subject: long-time relaxation
  schema: not_defined
- subject: magnetization reversal
  schema: not_defined
- subject: metastable state
  schema: not_defined
- subject: nucleation
  schema: not_defined

## Rights

- description: 'This is the peer reviewed version of the following article: Dynamical
    Simulation for Long-Time Relaxation From Metastable States: Quantitative Estimation
    of Coercive Field and Relaxation Time, which has been published in final form
    at https://doi.org/10.1002/ejic.202400458. This article may be used for non-commercial
    purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived
    Versions. This article may not be enhanced, enriched or otherwise transformed
    into a derivative work, without express permission from Wiley or by statutory
    rights under applicable legislation. Copyright notices must not be removed, obscured
    or modified. The article must be linked to Wiley’s version of record on Wiley
    Online Library and any embedding, framing or otherwise making available the article
    or pages thereof by third parties from platforms, services and websites other
    than Wiley Online Library must be prohibited.'
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-11-01
end_date: 2025-11-01

## Journal

- title: European Journal of Inorganic Chemistry
  issn: '14341948'
  article_number: e202400458

## Conference



## Related item



## Funding

- identifier: 'Scientific Research B (No. 24 K01332) '
  funder_name: MEXT

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## Fileset

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  filename: Nishino_EurJIC_accepted_manuscript.pdf
  content_type: application/pdf
  size: 14043834
  md5: 26a1760e73887203d4ecf7df5773d385

## Thumbnail

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filename: Nishino_EurJIC_accepted_manuscript.pdf