論文

査読有り
2017年7月

Experimental observation of temperature and magnetic-field evolution of the 4 f states in CeFe2 revealed by soft x-ray magnetic circular dichroism

PHYSICAL REVIEW B
  • Y. Saitoh
  • ,
  • A. Yasui
  • ,
  • H. Fuchimoto
  • ,
  • Y. Nakatani
  • ,
  • H. Fujiwara
  • ,
  • S. Imada
  • ,
  • Y. Narumi
  • ,
  • K. Kindo
  • ,
  • M. Takahashi
  • ,
  • T. Ebihara
  • ,
  • A. Sekiyama

96
3
開始ページ
35151
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.96.035151
出版者・発行元
AMER PHYSICAL SOC

We revisit the delocalized character of the 4f states of CeFe2 in the ferromagnetically ordered phase by x-ray magnetic circular dichroism (XMCD) in x-ray absorption spectroscopy (XAS) with improved data quality using single crystals. Surprisingly, the CeM4,5 XMCD spectral shape changes significantly as a function of temperature and applied magnetic field, with no concomitant changes in the spectral shape of the Ce M-4,M-5 XAS as well as the Fe L-2,L-3 XAS and XMCD. This unusual behavior is characterized by the J = 7/2 states in a 4f(1) configuration mixed into the J = 5/2 ground state. Such extreme sensitivity of the Ce 4f states to the external perturbations can be related to the magnetic instability toward an antiferromagnetic phase in CeFe2. Our experimental data presented here provide valuable insights into the underlying physics in strongly hybridized ferromagnetic Ce compounds.


リンク情報
DOI
https://doi.org/10.1103/PhysRevB.96.035151
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000406520800003&DestApp=WOS_CPL