Dielectric Dispersion in Ferroelectric Li_<2-x>Na_xGe_4O_9 (x≈1)
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概要
- 論文の詳細を見る
The dielectric dispersion in the ferroelectric Li_<2-x>Na_xGe_4O_9 (x≈1) single crystals has been measured in the frequency range from 120 Hz to 10 MHz around the transition temperature T_C=109 K. The Debye-type dispersion was observed in the MHz region. The relaxation time increases abruptly as T_C is approached from above, which shows the critical slowing-down of dielectric response. The relaxation time is 1.5×10^<-8> sec at 0.5 K above T_C. The softening of the optical phonon has not been observed by Raman scattering measurement. The ferroelectric phase transition of Li_<2-x>Na_xGe_4O_9(x≈1) is the typical order-disorder one. The origin of the polydispersive nature and the sample dependence of the relaxation time are discussed.
- 社団法人日本物理学会の論文
- 1993-12-15
著者
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ISHIBASHI Yoshihiro
Synthetic Crystal Research Laboratory, Faculty of Engineering, Nagoya University
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SAWADA Akikatsu
Department of Physics, Okayama University
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Yamashita Y
Power Supply Materials And Devices Laboratory Corporate R&d Center Toshiba Corporation
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Yamashita Yohachi
Toshiba Materials & Devices Research Laboratories
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WADA Mitsuo
Department of Physics, Faculty of Science, Shinsyu University
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Sawada A
Muroran Inst. Technology Muroran
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Yamashita Yasuharu
Synthetic Crystal Research Laboratory, School of Engineering, Nagoya University
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Yamashita Yasuharu
Synthetic Crystal Research Laboratory School Of Engineering Nagoya University
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Ishibashi Yoshihiro
Synthetic Crystal Research Laboratory
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Yamashita Y
Central Research Laboratory Hamamatsu Photonics K.k.
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Sawada Akikatsu
Department Of Applied Physics Faculty Of Engineering Nagoya University:(present Address)synthetic Cr
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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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