Proton NMR Study of Molecular Crystal Ferroelectrics, Trichloroacetamide (TCAA)

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概要

• 論文の詳細を見る

• Proton spin lattice relaxation time was measured and proton NMR spectrum was observed in a purely molecular ferroelectrics, trichloroacetamide (TCAA). From the temperature and the frequency dependences of the spin lattice relaxation time, it was found that the proton spin lattice relaxation is governed by the fluctuation of proton-proton dipolar interaction in the temperature range including the phase transition temperature. From the computer simulation analysis of NMR spectra, a slight change in proton-proton distance was deduced between the ferroelectric and the paraelectric phases. The relaxation time and then the correlation time of the protonic motion change abruptly at the transition temperature. It was determined that the activation energies of the protonic motion are 1.12 × 10^4 J/mol and 0.80 × 10^4 J/mol in the ferroelectric and the paraelectric phases, respectively.

• 社団法人日本物理学会の論文
• 2002-03-15

著者

• Fukuda Y

  Texas Instruments Tsukuba Res. And Dev. Center Ltd. Ibaraki Jpn

• Fukuda Y

  Department Of Physics Faculty Of Science Kobe University

• Fukuda Yukio

  Department Of Physics Faculty Of Science Kyoto University

• Hashimoto M

  Department Of Macromolecular Science And Engineering Graduate School Of Science And Technology Kyoto

• Hashimoto M

  Department Of Polymer Science And Engineering Faculty Of Textile Science Kyoto Institute Of Technolo

• Hashimoto Masao

  Department Of Chemistry Faculty Of Science Kobe University

• KUNITOMO Masakazu

  Department of Physics, Faculty of Science, Kobe University

• KOHMOTO Toshiro

  Department of Physics, Faculty of Science, Kobe University

• ETOH Rina

  Graduate School of Science and Technology, Kobe University

• HAYASHI Tomoyuki

  Graduate School of Science and Technology, Kobe University

• Hayashi T

  Graduate School Of Science And Technology Kobe University

• Kohmoto T

  Department Of Physics Faculty Of Science Kobe University

• Kunitomo M

  Department Of Physics Faculty Of Science Kobe University

• Kunitomo Masakazu

  Department Of Physics Kyoto University

• Kohmoto Toshiro

  Department Of Physics College Of Liberal Arts And Sciences Kyoto University

• Etoh Rina

  Graduate School Of Science And Technology Kobe University

• Fukuda Yukio

  Department of Electronic System Engineering, Faculty of System Engineering, Tokyo University of Science, Suwa, 5000-1 Toyohira, Chino, Nagano 391-0292, Japan

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