Neutron Diffraction Study of Structural Phase Transition in Ferroelectric Li_2Ge_7O_<15>
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概要
- 論文の詳細を見る
Structural change in Li.Ge.O., crystal associated with the ferroelectric phase transi-lion at 283.5 K has been investigated by neutron diffraction method. Comparison between the high- and the low-temperature structures proves that the change within aframework composed of corner-sharing [GeO.] and [Ge0.] polyhedra is ascribedmainly to cooperatively combined tilting motion of the tetrahedra. This phenomenonmay seem to be a soft phonon mode previously observed by the Raman scatterungmeasurement. Behavior of Li" ions in channels formed by the framework has alsobeen examined. It is shown quantitatively by using split-atom method that one of thetwo Li" ions in a broader channel seems to behave rather 'order-disorder' naturemotion along the channel direction in the vicinity of the transition temperature.
- 社団法人日本物理学会の論文
- 1987-07-15
著者
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ISHIBASHI Yoshihiro
Synthetic Crystal Research Laboratory, Faculty of Engineering, Nagoya University
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SAWADA Akikatsu
Synthetic Crystal Research Laboratory,Faculty of Engineering,Nagoya University
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WADA Mitsuo
Department of Physics, Faculty of Science, Shinsyu University
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SHIBUYA Iwao
Research Reactor Institute, Kyoto University
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Sawada A
Muroran Inst. Technology Muroran
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IWATA Yutaka
Research Reactor Institute,Kyoto University
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Ishibashi Yoshihiro
Synthetic Crystal Research Laboratory
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Iwata Y
Kyoto Univ. Osaka
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Iwata Yutaka
Research Reactor Institute Kyoto University
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Shibuya I
Research Reactor Institute Kyoto University
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Shibuya Iwao
Research Reactor Institute Kyoto University
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Sawada Akikatsu
Synthetic Crystal Research Laboratory
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Wada Mitsuo
Department Of Physics Faculty Of Liberal Arts Shinshu University
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Ishibashi Yoshihiro
Synthehic Crystal Reseach Laboratory Faculty Of Engineering Nagoya University
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WADA MITSUO
Department of Internal Medicine, Yamaguchi University School of Medicine
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Wada Mitsuo
Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University
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