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Thermally Stimulated Depolarization of NCO − Centres in Alkali Halide Crystals
Author(s) -
Wilbrand A.,
Fischer F.
Publication year - 1980
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.2220990124
Subject(s) - halide , rubidium , alkali metal , potassium , chemistry , sodium , dipole , ion , lattice (music) , analytical chemistry (journal) , inorganic chemistry , depolarization , atomic physics , physics , medicine , organic chemistry , chromatography , endocrinology , acoustics
In single crystals of chlorides, bromides, and iodides of sodium, potassium, and rubidium a TSD (also named ITC) peak between 65 and 29 K is found which is due to NCO − centres. The up to 20% broader bandwidths, compared to the theoretical shape, are attributed to residual stresses of the probe. The experimentally determined reorientation enthalpies of the centres range between 0.192 and 0.080 eV and show a linear dependence on the lattice constant within the investigated sodium, potassium, or rubidium halides. The experimental data of the electric dipole moments are in reasonable relation to calculated values of the free NCO − ion.