Gradient-Elastic Tensor of Alkali Halide Crystals

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概要

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• Origin of electric field gradient due to strains in alkali halide crystals is unravelled from the experimental determination of gradient-elastic tensors. Tensors for ^<23>Na, ^<35>Cl, ^<81>Br and ^<127>I in a series of crystals are determined from the quadrupolar broadening of resonance lines due to solute ions, using lattice distortion derived from lattice parameter changes. Results are interpreted by the theory which takes account of the contribution from valence electrons, besides point charge arrays, and gives an expression of a gradient-elastic tensor in terms of an anti-shielding factor, overlap integrals and a degree of covalency. An excellent agreement is found between the theoretical and experimental tensor values for ^<23>Na in NaCl, for which both theory and experiment are least ambiguous. For other crystals, a degree of covalency is tentatively estimated, with reasonable results.

• 社団法人日本物理学会の論文
• 1964-02-05

著者

• Fukai Yuh

  The Institute For Solid State Physics The University Of Tokyo:(present) Department Of Physics Aculty

• Fukai Yuh

  The Institute For Solid State Physics The University Of Tokyo

関連論文

• Lattice Distortion around Impurity Ions in Alkali Halide Crystals : I. Calculation of Lattice Distortion and Comparison with X-Ray Data of Lattice Parameter Changes
• Gradient-Elastic Tensor of Alkali Halide Crystals
• Lattice Distortion Around Impurity Ions in Alkali Halide Crystals : II.Quadrupolar Broadening of Nuclear Magnetic Resonance Lines

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