Phase Transition and Cation Dynamics in (CH_3ND_3)Bi_2Cl_<11> Crystal as Studied by ^1H and ^2H NMR
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概要
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The temperature dependence of the ^1H NMR spin-lattice relaxation time (T_1) and ^2H spectra were measured in (CH_3NH_3)_5Bi_2Cl_<11> and (CH_3ND_3)_5Bi_2Cl_<11> to investigate dynamic nature of the paraelectric-ferroelectric phase transition. T_1 anomaly was observed in the close vicinity of the transition temperature of 306.5 K and attributed to critical fluctuation associated with the phase transition. The precessional motion of the methylammonium cation derived from the observed ^2H spectra seems to be concerned with the order-disorder transition expected from the X-ray study.
- 社団法人日本物理学会の論文
- 1995-05-15
著者
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SUZUKI KOH-ICHI
Department of Pediatrics, Hirosaki University School of Medicine
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IKEDA Ryuichi
Department of Chemistry, University of Tsukuba
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Ikeda Ryuichi
Department Of Chemistry University Of Tsukuba
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Suzuki Koh-ichi
Department Of Chemistry University Of Tsukuba
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Ikeda Ryuichi
Department Of Chemistry Faculty Of Engineering Gifu University
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Ishimaru Shin′ichi
Department of Chemistry, University of Tsukuba
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