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Cd + (5s 1 ) Centres in Rb 2 ZnCl 4 Single Crystals
Author(s) -
Nistor S. V.,
Bouwen A.,
Schoemaker D.
Publication year - 1995
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.2221890203
Subject(s) - electron paramagnetic resonance , vacancy defect , ion , cadmium , crystallography , atmospheric temperature range , chemistry , absorption spectroscopy , irradiation , absorption (acoustics) , spectral line , zinc , atomic physics , analytical chemistry (journal) , materials science , nuclear magnetic resonance , physics , astronomy , meteorology , composite material , quantum mechanics , chromatography , organic chemistry , nuclear physics
Electron paramagnetic resonance and optical absorption spectra attributed to 5s 1 trapped electron Cd + (I) and Cd + (II) centres are observed over a broad temperature range in Rb 2 ZnCl 4 single crystals doped with cadmium, after X‐ray irradiation at 80 K and room temperature, respectively. The low temperature Cd + (I) centre, which seems to be a substitutional Cd + ion in a Zn 2+ site, transforms into a Cd + (II) centre at 190 K by trapping an anion vacancy, which has become mobile at this temperature, in its nearest‐neighbour positions. The suggested structural models of the Cd + centres are supported by the analysis of the spectral data considering covalency effects.