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Nuclear Spin Relaxation by Quadrupolar Interactions. The Diffusion of Substitutional Impurities in Ionic Crystals
Author(s) -
Becker K. D.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220870223
Subject(s) - impurity , diffusion , relaxation (psychology) , vacancy defect , ionic bonding , ion , spin (aerodynamics) , tracer , materials science , condensed matter physics , chemistry , nuclear magnetic resonance , crystallography , thermodynamics , physics , nuclear physics , psychology , social psychology , organic chemistry
Spectral densities are calculated for nuclear spin relaxation via quadrupolar interactions caused by the vacancy diffusion of impurities in NaCl‐type ionic crystals. The treatment, which takes correlation effects into account, is based on the encounter model. NMR cw‐studies on the diffusion of Na + ions in AgBr are analysed in the framework of this model. The impurity diffusion coefficients derived are found to be in good agreement with tracer diffusion data.