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Vibrational Resonance Mode and the Temperature Dependence of Hyperfine Coupling of Mn 2+ in BaO
Author(s) -
Žďánský K.
Publication year - 1968
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.19680280119
Subject(s) - anharmonicity , hyperfine structure , hyperfine coupling , impurity , atomic physics , resonance (particle physics) , atmospheric temperature range , coupling constant , chemistry , coupling (piping) , ion , phonon , spectral line , condensed matter physics , physics , materials science , thermodynamics , organic chemistry , metallurgy , particle physics , astronomy
The temperature dependence of the hyperfine coupling constant A of Mn 2+ in BaO is measured in the temperature range 4 to 300 ° K. It is shown that the theoretical temperature dependence of A given by Šimánek and Orbach [5] does not give a good agreement with the measured values. The temperature dependence of A is calculated by assuming that the interaction of the electronic states of the impurity ion with the resonance mode of vibration prevails over the interactions with the continuous phonon spectrum. To explain the discrepancy between the theoretical curve and the experimental data, the effect of anharmonic terms on the temperature dependence of hyperfine coupling is taken into account.