TY - JOUR
T1 - Structural Change at Metal-Insulator Transition of Tb2Ba2Co4O11
AU - Kusuya, Hiroyuki
AU - Machida, Akihiko
AU - Moritomo, Yutaka
AU - Kato, Kenichi
AU - Nishibori, Eiji
AU - Takata, Masaki
AU - Sakata, Makoto
AU - Nakamura, Arao
PY - 2001/12
Y1 - 2001/12
N2 - 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.
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.
KW - Double-perovskite structure
KW - Metal-insulator transition
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U2 - 10.1143/JPSJ.70.3577
DO - 10.1143/JPSJ.70.3577
M3 - Article
AN - SCOPUS:0035562905
VL - 70
SP - 3577
EP - 3580
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 12
ER -