Potential Functions of Ions in Cubic BaTiO_3
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概要
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Integrated intensities of X-ray Bragg reflections (Ag-Ka radiation) frombarium titanate single crystal were measured as a function of temperature abovethe Curie point of I31.2'C. The harmonic and fourth order anharmonic potentialparameters for constituent ions were estimated from the thermal vibrationamplitude of each ion. Potential parameters are: a(Ba)=1.OI8 x 10 " erg A-",z(Ti)=0.730x]0 "ergA-",<x(0)=0.265xI0 "ergA ',z'(0)=0.999 x 10 "ergA ", 7(Ba)=0.O55x10 "ergA ', y(Ti)=0.679xl0 "ergA ', y(0)=-0.400x10="erg,A-',7'(0)=2.99xI0 "ergA '; and the Grfineisen con-stant is 1.22. These values are consistent with suggestions presented in previousneutron diffraction studies by Y. Yamada et al. and J. Harada et al.
- 社団法人日本物理学会の論文
- 1979-11-15
著者
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Tanaka Masahiro
Department Of Physics Faculty Of Science Hokkaido University
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Tanaka Masahiro
Department Of Applied Chemistry
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Sawaguchi E
Agne-gijutsu Center
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Sawaguchi Etsuro
Department Of Physics Faculty Of Science Hokkaido University
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Shiozaki Yoichi
Department Of Physics Faculty Of Science Hokkaido University
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Tanaka Masahiro
Department Fixed Prosthodontics And Occlusion Osaka Dental University
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