Temperature Dependence of the Nuclear Quadrupole Relaxation Rate in Silver and Sodium Halide Crystals
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概要
- 論文の詳細を見る
The results of the temperature dependence of nuclear relaxation rate, 1/T_1 measured for ^<23>Na, ^<35>Cl and ^<79>Br in AgX and NaX with X being Cl and Br are interpreted in terms of the quadrupole relaxation due to lattice vibrations and defect motions. The data of 1/T_1 in the low temperature region are compared with a model calculation based on an ionic model, in which the degree of covalency is estimated. The result is 24.5% in AgBr and 20.5% in AgCl, which are found to be an order of magnitude larger than the values in sodium halides. On the other hand, from an analysis of 1/T_1 data in the high temperature region, the migration and formation energies of defects are evaluated and compared with the results of previous conductivity measurements. The obtained activation energies for migration are 0.27 eV in AgBr, 0.23 eV in AgCl and 0.60 eV in NaCl.
- 社団法人日本物理学会の論文
- 1995-02-15
著者
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OHNO Takashi
Department of Psychiatry, Tohoku University Graduate School of Medicine
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Takao Kohara
Department Of Material Science Faculty Of Science Himeji Institute Of Technology
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Kanashiro Tatsuo
Department Of Quantum Materials Science Institute Of Technology The University Of Tokushima
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Kohori Y
Chiba Univ. Chiba
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Kanashiro T
Department Of Quantum Materials Science Institute Of Technology The University Of Tokushima
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KISHIMOTO Yutaka
Department of Physics, Faculty of Engineering, Tokushima University
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MICHIHIRO Yoshitaka
Department of Physics, Faculty of Engineering, The University of Tokushima
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Yamanishi Toshihiro
Department of Physics, Faculty of Engineering, Tokushima University
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Ohno T
Department Of Quantum Materials Science University Of Tokushima
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Kanashiro Tatsuo
Department Of Physics Faculty Of Engineering Tokushima University
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Yamanishi Toshihiro
Department Of Physics Faculty Of Engineering Tokushima University
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Ohno Takashi
Department Of Agrobioscience Graduate School Of Agriculture Kobe University
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MICHIHIRO Yoshitaka
Institute of Physics, University of Tsukuba
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