Valence transition of EuRh2Si2

Akihiro Mitsuda*, Hirofumi Wada, Ryo Masuda, Shinji Kitao, Makoto Seto, Yoshitaka Yoda, Hisao Kobayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We have studied 151Eu Mössbauer effects on EuRh2Si2 at a high pressure of 1.0 GPa as well as at ambient pressure. The compound shows a temperature-induced valence transition from the Eu2+ state to the nearly Eu3+ state with decreasing temperature at P ≥ 1.0 GPa. The synchrotron-radiation-based Mössbauer spectroscopy is applied to the measurements under a high pressure. The Eu2+ ratio abruptly decreases at around 30 K reflecting the temperature-induced valence transition. We also observed a valence transition due to magnetic field by Mössbauer spectroscopy for the first time. It was found that a considerable amount (∼45%) of Eu atoms do not participate in the valence transition. We discuss the origin of these Eu atoms by calculating the magnetization based on the Mössbauer spectroscopy data.

Original languageEnglish
Article number104703
Journaljournal of the physical society of japan
Volume89
Issue number10
DOIs
Publication statusPublished - 2020 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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