# Er-driven incommensurate to commensurate magnetic phase transition of Fe in the spin-chain compound <math>  <msub>    <mi>BaErFeO</mi>    <mn>4</mn>  </msub></math>

https://mdr.nims.go.jp/datasets/fc6d9d5e-c271-484e-9390-14b824f63b0a

## File

- [PhysRevB.109.064403-BaErFeO4-neutron.pdf](https://mdr.nims.go.jp/filesets/9533dbd5-a154-428f-8ce2-5af7185185b1/download) ([Detail](https://mdr.nims.go.jp/filesets/9533dbd5-a154-428f-8ce2-5af7185185b1.md))

## Id

fc6d9d5e-c271-484e-9390-14b824f63b0a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-03-01T00:59:38.272669Z

## Updated at

2024-03-19T07:56:48.968586Z

## Published at

2024-03-19T07:56:49.325494Z

## Doi



## First published url

https://doi.org/10.1103/physrevb.109.064403

## Date published

2024-02-02

## Recorded date published

2024-2

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Er-driven incommensurate to commensurate magnetic phase transition of Fe
    in the spin-chain compound <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>BaErFeO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>
  title_type: original
  lang: en

## Description

- description: Magnetic phase transitions and structures of the spin chain compound
    BaErFeO4 were investigated by measurements of magnetic properties and neutron
    diffraction. The lattice geometry of the orthorhombic crystal structure (space
    group Pnma) of the BaRFeO4 compounds (R = Dy–Yb, Y) supports frustrations which
    lead to multiple magnetic phase transitions with complex magnetic structures.
    BaErFeO4 undergoes three successive magnetic phase transitions at TN1 = 49 K,
    TN2 = 33.4 K and TN3 = 3.4 K. In contrast to the previously investigated BaRFeO4
    (R = Y, Tm, Yb) compounds, all with incommensurate magnetic propagation vectors
    k1 = (0, 0, kz), BaErFeO4 is the first member in this series that shows a phase
    transition from an incommensurate (k1 below TN1) to a commensurate magnetic structure
    with k2 = (1/2, 0, 1/2) below TN2. In the crystal structure all magnetic ions
    are part of chains propagating along the b-axis. Below TN1, strong antiferromagnetic
    Fe-Fe spin-exchange coupling between square pyramidal (Fe1) and octahedral (Fe2)
    centres generates a collinear antiferromagnetic structure with a constant size
    of the ordered Fe moments and a constant magnetic phase inside each chain of Fe3+
    cations. Exchange coupling between the Fe chains is much weaker. At TN2, 3d–4f
    exchange interactions induce an ordered moment at the Er3+ ions, which results
    in a change of the direction of the ordered Fe moments from the b-direction (above
    TN2) to inside the ac-plane (below TN2) and a change from an incommensurate (k1
    above TN2) to a commensurate (k2 below TN2) antiferromagnetic structure. Towards
    lower temperature, 4f–4f exchange interactions become stronger and create at TN3
    a constant magnetic phase inside each chain of Er3+ cations. At TN2 and at TN3,
    the magnetic susceptibility shows sharp decreases that coincide with large increases
    of the correlation length of the magnetic structure. The unique magnetic structures
    of BaErFeO4 are compared with those of other BaRFeO4 compounds by considering
    experimental and theoretical aspects.
  description_type: abstract
  lang: und

## Creator

- name: Andreas Dönni
  role: author
  orcid: https://orcid.org/0000-0002-7300-9175
  organization: National Institute for Materials Science
- name: Vladimir Y. Pomjakushin
  role: author
- name: Alexei A. Belik
  role: author
  orcid: https://orcid.org/0000-0001-9031-2355
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: ferrites
  schema: not_defined
- subject: neutron diffraction
  schema: not_defined
- subject: magnetic structures
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: '24699969'
  article_number: '064403'

## Conference



## Related item



## Funding

- funder_name: Paul Scherrer Institut
- identifier: '20202060'
  funder_name: HRPT
- identifier: '20202060'
  funder_name: Swiss Spallation Neutron Source SINQ

## Instrument



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



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## Fileset

- id: 9533dbd5-a154-428f-8ce2-5af7185185b1
  filename: PhysRevB.109.064403-BaErFeO4-neutron.pdf
  content_type: application/pdf
  size: 2982087
  md5: a8e4d5debb4a0d6003752b30922fad2a

## Thumbnail

fileset_id: 9533dbd5-a154-428f-8ce2-5af7185185b1
filename: PhysRevB.109.064403-BaErFeO4-neutron.pdf