Magnetic correlation in the ordered phase of CeOs4Sb 12

Kazuaki Iwasa, Shouhei Itobe, Changping Yang, Youichi Murakami, Masahumi Kohgi, Keitaro Kuwahara, Hitoshi Sugawara, Hideyuki Sato, Naofumi Aso, Takashi Tayama, Toshiro Sakakibara

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We performed neutron diffraction and magnetization measurements to reveal the nature of phase transition of a Kondo semiconductor CeOs4Sb 12. Weak antiferromagnetic (AFM) reflections characterized by a wave vector q = (1 0 0) were observed, and the ordered moment value is around 0.07μB/Ce at zero magnetic field. The AFM structure is rapidly suppressed by magnetic field of 1 T, in contrast to the transition temperature suggested to be enhanced by magnetic field. Only ferromagnetic correlation is observed above 1 T. Such drastic variation of the magnetic correlation is closely connected into the transport properties; the AFM ordered phase below 1 T and the induced ferromagnetic state above 1 T correspond to the semiconducting and metallic states, respectively.

Original languageEnglish
Pages (from-to)318-320
Number of pages3
Journaljournal of the physical society of japan
Issue numberSUPPL.A
Publication statusPublished - 2008
Externally publishedYes


  • C-f hybridization
  • Kondo semiconductor
  • Weak magnetism

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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