Origin of room-temperature ferromagnetism in Co-doped CeO2

Kenji Tarui, Tomohiro Oomori, Yuya Ito, Tomoyuki Yamamoto*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Co-doped CeO2 fabricated using the conventional solid-state reaction method demonstrates ferromagnetism at room temperature (RT). To investigate the origin of ferromagnetism at RT, powder X-ray diffraction analysis is first performed, in which pattern changes due to Co doping are not indicated. Subsequently, local environment analysis is carried out using X-ray absorption near-edge structure (XANES) measurements at the Co K-edge, demonstrating the metallic valence state of Co. Hence, it is confirmed that Co exists as nanosized small particles in CeO2, which demonstrates ferromagnetism at RT.

Original languageEnglish
Article number413158
JournalPhysica B: Condensed Matter
Volume619
DOIs
Publication statusPublished - 2021 Oct 15

Keywords

  • CeO
  • Co
  • Dilute magnetic material
  • X-ray absorption near-edge structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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