Nuclear Quadrupole Interactions of ^7Li and ^<51>V in a Li_3VO_4 Single Crystal Studied by Nuclear Magnetic Resonance
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概要
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The rotation patterns of the nuclear magnetic resonances of ^7Li (I = 3/2) and ^<51>V (I = 7/2) in the nonlinear optical Li_3VO_4 single crystal were measured in two mutually perpendicular crystal planes. From these results, the quadrupole coupling constants and the asymmetry parameters at room temperature were determined for the first time as follows: e^2qQ/h = 53.68 ± 2kHz and η = 0.169 for ^7Li, and e^2qQ/h = 1.44 ± 2MHz and η = 0 for ^<51>V. The symmetry for the electric field gradient (EFG) of V ions surrounded by four oxygen atoms is higher than that of Li ions surrounded by four oxygen atoms. The principal axes of the EFG tensor are a = Y, b = Z, c = X for ^7Li, and a = b = X, c = Z for^<51>V nucleus. Also, the ^7Li and the ^<51>V spin-lattice relaxation rates were measured, and the behavior is quite similar for both nuclei. The measured relaxation rate was found to be linear in the square of the temperature. The Raman process with a T^2 dependence is considered to be more effective than the direct process for nuclear quadrupole relaxation.
- 社団法人日本物理学会の論文
- 2003-02-15
著者
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KIM Jung
Department of Occupational Medicine, College of Medicine, Dong-A University
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PARK Sung
Department of Material Science & Engineering, Gwangju Institute of Science and Technology
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Park Sang
The National Creative Research Initiatives Center For Electron Emission Source Samsung Advanced Inst
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Kim J
Department Of Physics Pusan National University
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Kim Jung
Department Of Applied Chemistry School Of Engineering The University Of Tokyo
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Jang M
Pusan National Univ. Pusan Kor
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Jang Min-su
Research Center For Dielectric And Advanced Matter Physics Pusan National University
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Jang Min
Research Center For Dielectric And Advanced Matter Physics Pusan National University
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Jang Min
Department Of Physics Pusan National University
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Jang M‐s
Research Center For Dielectric And Advanced Matter Physics Pusan National University
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Lim A
Jeonju Univ. Jeonju Kor
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LIM Ae
Department of Physics, Jeonju University
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Lim Ae
Department Of Physics Jeonju University
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Jang Min
Department Of Physics And Rcdamp Pusan National University
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Park S.
Department Of Chemistry Jeonju Uneversity
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Jang M
Department Of Physics Pusan National University
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Park S
Department Of Chemistry Jeonju Uneversity
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Lin Ae
Department Of Physics Jeonju University
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Park Sung
Department Of Anesthesia And Pain Medicine School Of Medicine Pusan National University
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Kim Jung
Department Of Applied Bioscience Cha University
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