TY - JOUR
T1 - Structural phase transition in (NH3)K3C60
AU - Ishii, K.
AU - Watanuki, T.
AU - Fujiwara, A.
AU - Suematsu, H.
AU - Iwasa, Y.
AU - Shimoda, H.
AU - Takenobu, T.
AU - Mitani, T.
PY - 2000
Y1 - 2000
N2 - Crystal structure of the ammoniated alkali fulleride, (NH3)K3C60, was studied by high resolution x-ray diffraction experiments. We found a structural phase transition at low temperature. A superstructure appears below the transition temperature, Ts ≅ 150 K, and it originates from the orientational ordering of K-NH3 pairs in the octahedral site. Below Ts, K-NH3 pairs align in an antiferroelectric fashion, which is understood by electrostatic interaction between them. We also measured a deuteration effect to the transition. Similar transition was observed in (ND3)K3C60 and difference in Ts was very little.
AB - Crystal structure of the ammoniated alkali fulleride, (NH3)K3C60, was studied by high resolution x-ray diffraction experiments. We found a structural phase transition at low temperature. A superstructure appears below the transition temperature, Ts ≅ 150 K, and it originates from the orientational ordering of K-NH3 pairs in the octahedral site. Below Ts, K-NH3 pairs align in an antiferroelectric fashion, which is understood by electrostatic interaction between them. We also measured a deuteration effect to the transition. Similar transition was observed in (ND3)K3C60 and difference in Ts was very little.
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M3 - Article
AN - SCOPUS:0033682524
SN - 1058-725X
VL - 340
SP - 571
EP - 576
JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
ER -