# Bulk modulus and thermal expansion of rare-earth tetraborides RB4 (R = Gd, Tb, Dy, Ho, and Tm) via <i>in situ</i> x-ray diffraction

https://mdr.nims.go.jp/datasets/721c2d24-4704-44d7-ad53-0b6db3258f5a

## File

- [JAP25-AR-03496.pdf](https://mdr.nims.go.jp/filesets/6df0e518-7398-469d-8cd2-92d11514cb41/download) ([Detail](https://mdr.nims.go.jp/filesets/6df0e518-7398-469d-8cd2-92d11514cb41.md))

## Id

721c2d24-4704-44d7-ad53-0b6db3258f5a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-09-08T00:31:49.414135Z

## Updated at

2025-09-08T07:30:29.862190Z

## Published at

2025-09-08T07:19:25.818532Z

## Doi

https://doi.org/10.48505/nims.5736

## First published url

https://doi.org/10.1063/5.0287850

## Date published

2025-09-07

## Recorded date published

2025-9-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Bulk modulus and thermal expansion of rare-earth tetraborides RB4 (R = Gd,
    Tb, Dy, Ho, and Tm) via <i>in situ</i> x-ray diffraction
  title_type: original
  lang: en

## Description

- description: X-ray diffraction experiments were conducted on the rare-earth tetraborides
    RB4 (R=Gd, Tb, Dy, Ho and Tm) under high pressure at room and low temperature
    at atmospheric pressure to investigate their structural and lattice behavior,
    and thus determine their bulk moduli and thermal expansion coefficients. The bulk
    modulus values ranged from 170 to 180 GPa for all rare earths. These values lie
    between those of RB6 and RB12 structures and do not exhibit a simple correlation
    with boron concentration, but rather correlate with the R–B distance in the coordination
    polyhedron. RB4, which features a tetragonal crystal structure with a Shastry–Sutherland
    lattice, shows anisotropy where the c-axis is more compressible than the a-axis.
    Additionally, lattice contraction due to temperature changes exhibits similar
    anisotropy. Considering the a/c anisotropy per unit volume, this indicates that
    the thermal contraction effect is greater than the compression effect.
  description_type: abstract
  lang: und

## Creator

- name: Hitoshi Yusa
  role: author
  orcid: https://orcid.org/0000-0001-6980-9279
- name: Fumitoshi Iga
  role: author
  orcid: https://orcid.org/0000-0001-6912-8414

## Contact agent



## Publisher

organization: AIP Publishing

## Managing organization



## Keyword

- subject: Shastry–Sutherland lattice
  schema: not_defined
- subject: Bulk modulus
  schema: not_defined
- subject: Thermal expansion
  schema: not_defined
- subject: High-pressure
  schema: not_defined
- subject: Diamond anvil cell
  schema: not_defined
- subject: Tetraborides
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Journal of Applied Physics
  issn: '00218979'
  volume: '138'
  issue: '9'
  article_number: '095903'

## Conference



## Related item



## Funding

- identifier: 19H05790
  funder_name: Japan Society for the Promotion of Science
- identifier: 23K17711
  funder_name: Japan Society for the Promotion of Science
- 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



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## Fileset

- id: 6df0e518-7398-469d-8cd2-92d11514cb41
  filename: JAP25-AR-03496.pdf
  content_type: application/pdf
  size: 1214262
  md5: 5515df7fef490aa523c03b101ffe8bde

## Thumbnail

fileset_id: 6df0e518-7398-469d-8cd2-92d11514cb41
filename: JAP25-AR-03496.pdf