Hyper-Raman Study of Ferroelectric Phase Transition of Li_2Ge_7O_<15>
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概要
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The ferroelectric phase transition of Li.Ge.O., was investigated by means of thehyper-Raman scattering. The underdamped soft mode was observed at temperaturesabove 305 K in the paraelectric phase. In the further lower temperature region, anunresolved central peak is observed. The temperature dependence of the intensity ofthe central peak is characterized by the diverging behavior near the transition temperalure and the linear increase with decreased temperature in the ferroelectric phase.These can be attributed to the hyper-Raman scattering due to the polarization fluctua-tion, and the optical second harmonic generation which becomes active in the ferroelectric phase, respectively.
- 社団法人日本物理学会の論文
- 1988-09-15
著者
-
MORIOKA Yoshiyuki
Department of Chemistry,Faculty of Science,Tohoku University
-
Sawada Akikatsu
Synthetic Crystal Research Laboratory
-
Wada Mitsuo
Department Of Physics Faculty Of Liberal Arts Shinshu University
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Morioka Yoshiyuki
Department Of Chemistry Faculty Of Science Saitama University
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