Anisotropy of Nuclear Magnetic Resonance due to Crystal Dislocations
- 1 October 1958
- journal article
- research article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 13 (10), 1155-1167
- https://doi.org/10.1143/jpsj.13.1155
Abstract
Using plastically deformed crystals of KI, the nuclear magnetic resonance of I 127 has been observed. The broadened signals of I 127 show distinct anisotropy as regards the direction of the external magnetic field. This anisotropy is interpreted to arise from the definite orientation of a crystal dislocation. The experimental results are analyzed in terms of the gradient-elastic tensor which has been introduced by Shulman-Wyluda-Anderson. It is concluded that densities of edge and screw dislocations are fairly well balanced and increase for a certain range almost linearly with degree of cold-working, in agreement with the previously reported result for KBr. Assuming the total dislocation density to be 10 9 cm -2 for ten percent deformation, we get | C 44 |∼8×10 4 statvolts/dyne and its one-third for | C 11 |. Comparison with the result for KBr shows that the amplification factor of e Q q is greater than 50 for I 127 in KI.Keywords
This publication has 4 references indexed in Scilit:
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