^<23>Na Nuclear-Magnetic-Resonance Study of the Ferroelectric Transition in Silver Sodium Dinitrite, AgNa(NO_2)_2
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概要
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The central NMR spectrum of ^<23>Na in the ferroelectric silver sodium dinitrite (AgNa(NO_2)_2) is investigated. The second-order quadrupolar-shifts in the single crystals are measured. The rotation patterns about the three crystalline axes in the paraelectric and the ferroelectric phases are analysed by Volkoff method. For the calculation of the EFG, the chemical shift of ^<23>Na ions as well as the distrbution in the EFG must be taken into account. The ^<23>Na EFG tensors in a unit cell of AgNa(NO_2)_2 are identical in the paraelectric phase. The split into the two kinds of EFG whose principal components are equsl in magnitude and differ only in the orientation of the principal axes. The powdered samples show that nonstoichiometry does not affect the electric field gradient seriously. The temperature dependence of the EFG tensor is discussed in comparison with that of NaNO_2.
- 社団法人日本物理学会の論文
- 1973-02-05
著者
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Hikita Tomoyuki
Research Institute Of Applied Electricity Hokkaido University:department Of Applied Physics Faculty
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KASAHARA Masaru
Research Institute of Applied Electricity,Hokkaido University
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TATSUZAKI Itaru
Research Institute of Applied Electricity,Hokkaido University
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Hikita Tomoyuki
Research Institute Of Applied Electricity Hokkaido University
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Kasahara Masaru
Research Institute For Electronic Science Hokkaido University
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Tatsuzaki Itaru
Research Institute Of Applied Electricity Hokkaido University
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Kasahara Masaru
Reseach Institute For Electronic Science Hokkaido University
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