Phonon echo study on lithium ionic diffusion in LiNbO3 powder
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概要
- 論文の詳細を見る
Two-pulse phonon echo measurements were performed from room temperature to 900 K in micro particles of polycrystalline and single crystalline LiNbO3 to investigate the relationship between lithium ionic diffusion and decay time, $T_{2}$, in a phonon echo study. Decay time was dependent on temperature, showing a rapid decrease above 800 K in the polycrystalline sample. The origin of this anomaly is interpreted in terms of a simple Debye-type relaxation due to lithium ionic diffusion. The activation energy, which was evaluated as 0.93 eV in the polycrystalline samples, was comparable with reported values from ionic conductivity and NMR studies. On the other hand, single crystalline LiNbO3 showed no signs of lithium ionic diffusion up to 900 K. The contribution to $T_{2}$ from lithium ionic diffusion would be dominant at higher temperatures than 900 K because of the much higher activation energy in a single crystalline sample. It is shown that phonon echo decay time is strongly connected with ionic diffusion in the particles.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-06-15
著者
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MICHIHIRO Yoshitaka
Department of Physics, Faculty of Engineering, The University of Tokushima
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Katayama Fumiaki
Department Of Physics Faculty Of Engineering The University Of Tokushima
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Nakabayashi I
Department Of Chemical Science And Technology Faculty Of Engineering The University Of Tokushima
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Moriga T
Department Of Chemical Science And Technology Faculty Of Engineering The University Of Tokushima
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Nakamura Koichi
Department Of Clinical Pharmacology And Therapeutics Oita University Faculty Of Medicine
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Kanashiro T
Department Of Physics Faculty Of Engineering University Of Tokushima
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Mahbubar Rahman
Department of Physics, Faculty of Engineering, The University of Tokushima, 2-1 Minami-Josanjima-Cho, Tokushima 770-8506, Japan
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Mahbubar RM
Department of Physics, Faculty of Engineering, The University of Tokushima, 2-1 Minami-Josanjima-Cho, Tokushima 770-8506, Japan
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Michihiro Yoshitaka
Department of Physics, Faculty of Engineering, The University of Tokushima, 2-1 Minami-Josanjima-Cho, Tokushima 770-8506, Japan
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Kanashiro Tatsuo
Department of Physics, Faculty of Engineering, The University of Tokushima, 2-1 Minami-Josanjima-Cho, Tokushima 770-8506, Japan
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Nakamura Koichi
Department of Chemistry, Faculty of Science, Hokkaido University
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