Structural phase transition in (NH3)K3C60

K. Ishii, T. Watanuki, A. Fujiwara, H. Suematsu, Y. Iwasa, H. Shimoda, T. Takenobu, T. Mitani

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)571-576
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume340
Publication statusPublished - 2000
Externally publishedYes

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Alkalies
Coulomb interactions
Superconducting transition temperature
Diffraction
Crystal structure
Phase transitions
X rays
fullerides
Experiments
Temperature
alkalies
x ray diffraction
transition temperature
electrostatics
crystal structure
high resolution
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Ishii, K., Watanuki, T., Fujiwara, A., Suematsu, H., Iwasa, Y., Shimoda, H., ... Mitani, T. (2000). Structural phase transition in (NH3)K3C60 Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, 340, 571-576.

Structural phase transition in (NH3)K3C60 . / Ishii, K.; Watanuki, T.; Fujiwara, A.; Suematsu, H.; Iwasa, Y.; Shimoda, H.; Takenobu, T.; Mitani, T.

In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 340, 2000, p. 571-576.

Research output: Contribution to journalArticle

Ishii, K, Watanuki, T, Fujiwara, A, Suematsu, H, Iwasa, Y, Shimoda, H, Takenobu, T & Mitani, T 2000, 'Structural phase transition in (NH3)K3C60 ', Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, vol. 340, pp. 571-576.
Ishii, K. ; Watanuki, T. ; Fujiwara, A. ; Suematsu, H. ; Iwasa, Y. ; Shimoda, H. ; Takenobu, T. ; Mitani, T. / Structural phase transition in (NH3)K3C60 In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals. 2000 ; Vol. 340. pp. 571-576.
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AU - Fujiwara, A.

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AU - Iwasa, Y.

AU - Shimoda, H.

AU - Takenobu, T.

AU - Mitani, T.

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