Structural Change at Metal-Insulator Transition of Tb2Ba2Co4O11

Hiroyuki Kusuya, Akihiko Machida, Yutaka Moritomo, Kenichi Kato, Eiji Nishibori, Masaki Takata, Makoto Sakata, Arao Nakamura

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)


Temperature variation of the crystal structure has been investigated for Tb2Ba2CO4O11, which shows a metal-insulator (MI) transition at TMI = 340 K. The compound has a layered-type double-perovskite structure along the c-axis, with alternating the CoO6 octahedron and the CoO5 pyramids along the a-axis. With decrease of temperature below TMI, the distortion of the octahedral and pyramidal sites is fairly released, suggesting that spin state transition of the Co3+ ions is the origin for the MI transition.

Original languageEnglish
Pages (from-to)3577-3580
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number12
Publication statusPublished - 2001 Dec
Externally publishedYes


  • Double-perovskite structure
  • Metal-insulator transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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