Structural Change at Metal-Insulator Transition of Tb2Ba2Co4O11

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

doi:10.1143/JPSJ.70.3577

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 journal › Article

64 Citations (Scopus)

Abstract

Temperature variation of the crystal structure has been investigated for Tb₂Ba₂CO₄O₁₁, which shows a metal-insulator (MI) transition at T_MI = 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 T_MI, 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 language	English
Pages (from-to)	3577-3580
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	70
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.70.3577
Publication status	Published - 2001 Dec
Externally published	Yes

Keywords

Double-perovskite structure
Metal-insulator transition

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.70.3577

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Kusuya, H., Machida, A., Moritomo, Y., Kato, K., Nishibori, E., Takata, M., Sakata, M., & Nakamura, A. (2001). Structural Change at Metal-Insulator Transition of Tb2Ba2Co4O11 . Journal of the Physical Society of Japan, 70(12), 3577-3580. https://doi.org/10.1143/JPSJ.70.3577

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abstract = "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.",

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AU - Takata, Masaki

AU - Sakata, Makoto

AU - Nakamura, Arao

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AB - 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.

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