X-ray absorption spectroscopy and novel electronic properties in heavy fermion compounds YbT2Zn20 (T: Rh and Ir)

Fuminori Honda, Yusuke Hirose, Atsushi Miyake, Masaichiro Mizumaki, Naomi Kawamura, Satoshi Tsutsui, Tetsu Watanuki, Shinji Watanabe, Tetsuya Takeuchi, Rikio Settai, Dai Aoki, Yoshichika O'Nuki

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

YbT2Zn20 (T: Rh and Ir), which crystallizes in the cubic CeCr2Al20-type structure, is a member of the well-known heavy fermion compounds, indicating a huge electronic specific heat coefficient γ ≃ 500 mJ/(K2·mol). We have measured temperature and magnetic field dependences of Yb valence in YbT2Zn20 (T: Rh and Ir) at ambient pressure by the Lm edge x- ray absorption spectroscopy in order to investigate the valence state of Yb 4f electrons in these compounds. It is revealed that the Yb valence in both compounds significantly decreases with temperature below about 100 K and increases with increasing magnetic field at low temperatures in contrast to the case of YbCo2Zn20.

Original languageEnglish
Article number012021
JournalJournal of Physics: Conference Series
Volume592
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1
Event2014 International Conference on Strongly Correlated Electron Systems, SCES 2014 - Grenoble, France
Duration: 2014 Jul 72014 Jul 14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'X-ray absorption spectroscopy and novel electronic properties in heavy fermion compounds YbT<sub>2</sub>Zn<sub>20</sub> (T: Rh and Ir)'. Together they form a unique fingerprint.

Cite this