# High-Resolution Magnetostriction Measurements of the Pauli-Limited Superconductor Sr                    <sub>2</sub>                    RuO                    <sub>4</sub>

https://mdr.nims.go.jp/datasets/dc29afc7-96c5-4cfc-bb83-0cb71a12a633

## File

- [2511.06938v2.pdf](https://mdr.nims.go.jp/filesets/0e4b6dee-8f79-4360-b389-4efa5caeb0e2/download) ([Detail](https://mdr.nims.go.jp/filesets/0e4b6dee-8f79-4360-b389-4efa5caeb0e2.md))

## Id

dc29afc7-96c5-4cfc-bb83-0cb71a12a633

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-12T06:47:04.989589Z

## Updated at

2025-12-12T23:30:28.708736Z

## Published at

2025-12-12T23:22:20.087338Z

## Doi



## First published url

https://doi.org/10.7566/jpsj.95.014704

## Date published

2026-01-15

## Recorded date published

2026-1-15

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: High-Resolution Magnetostriction Measurements of the Pauli-Limited Superconductor
    Sr                    <sub>2</sub>                    RuO                    <sub>4</sub>
  title_type: original
  lang: en

## Description

- description: "We performed ultra-high-resolution magnetostriction measurements on
    the Pauli-limited superconductor Sr2RuO4 using high-quality single crystals. A
    first-order superconducting transition, accompanied by pronounced hysteresis,
    was observed under in-plane magnetic fields, where the relative length change
    of the sample, ∆L/L, was on the order of 10^(−8), requiring the use of highly
    sensitive detection techniques. To ensure the reliability of the measurements,
    particular attention was paid to minimizing the influence of magnetic torque,
    which can significantly affect data under in-plane field configurations, via field-angle-resolved
    magnetostriction. Within the hysteresis regime, slightly below the Pauli-limited
    upper critical field Bc2, a hump-like anomaly in the magnetostriction coefficient
    was identified. Furthermore, a characteristic double-peak structure in the field-angle
    derivative of the magnetostriction provides additional support\r\nfor this anomaly.
    These findings may reflect a lattice response associated with the emergence of
    the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase in Sr2RuO4. However, the phase
    boundary inferred from the magnetostriction data qualitatively deviates from that
    suggested by NMR measurements, highlighting the necessity for further experimental
    and theoretical investigations to elucidate the nature of the FFLO state in this
    material."
  description_type: abstract
  lang: und

## Creator

- name: Shunichiro Kittaka
  role: author
  orcid: https://orcid.org/0000-0002-5440-4831
- name: Yohei Kono
  role: author
  orcid: https://orcid.org/0000-0001-7613-3721
- name: Toshiro Sakakibara
  role: author
- name: Naoki Kikugawa
  role: author
  orcid: https://orcid.org/0000-0003-3975-4478
- name: Shinya Uji
  role: author
  orcid: https://orcid.org/0000-0001-9351-6388
- name: Dmitry A. Sokolov
  role: author
- name: Kazushige Machida
  role: author

## Contact agent



## Publisher

organization: Physical Society of Japan

## Managing organization



## Keyword

- subject: Sr2RuO4, superconductivity, Thermal expansion and Magnetostriction, FFLO
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of the Physical Society of Japan
  issn: '00319015'
  volume: '95'
  issue: '1'
  article_number: '014704'

## Conference



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## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: 0e4b6dee-8f79-4360-b389-4efa5caeb0e2
  filename: 2511.06938v2.pdf
  content_type: application/pdf
  size: 933691
  md5: 30c29bff1b0a3d8607f595609ed3ca0d

## Thumbnail

fileset_id: 0e4b6dee-8f79-4360-b389-4efa5caeb0e2
filename: 2511.06938v2.pdf