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ESR spectra reflecting the motion of ligands in NH 4 Cl:Cu 2+
Author(s) -
Watanabe K.,
Abe H.
Publication year - 1975
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.2220720129
Subject(s) - spectral line , ion , impurity , tetrahedron , chemistry , activation energy , doping , crystallography , analytical chemistry (journal) , physics , condensed matter physics , organic chemistry , chromatography , astronomy
The ESR spectra of doped impurity (centre I in the system of NH 4 Cl:Cu 2+ ) which reflect the motions of ligands were examined. The frequency (4 to 33 GHz) and temperature (4.2 to 400 K) dependence of the Cu 2+ spectrum can be explained at low temperatures by the motion of Cl − ions and at around room temperature, including partial fading‐out of its hfs, by that of reorienting NH 4 + tetrahedra for which the activation energy is deduced as 2570 K.