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Thermal Conductivity of Ni ++ Doped AgCl
Author(s) -
Donecker J.
Publication year - 1972
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.2220510240
Subject(s) - rayleigh scattering , scattering , phonon scattering , thermal conductivity , condensed matter physics , doping , perturbation (astronomy) , conductivity , materials science , phonon , chemistry , thermodynamics , physics , optics , quantum mechanics
The thermal conductivity of quenched AgCl crystals doped with 190 to 3300 ppm Ni ++ has been measured between 2 and 70 °K. The values have been analysed within the framework of the relaxation‐time approximation. It was not possible to describe the temperature dependence of each of the experimental curves or their concentration dependence solely with a Rayleigh‐type phonon scattering mechanism. A perturbation treatment of the scattering by a mass‐defect complex yields deviations from the Rayleigh behaviour at high frequencies. But these theoretical deviations cannot explain the experimental data. It is suggested that resonance scattering of the vacancy is the additional scattering mechanism. The values of the Rayleigh‐scattering parameters of the complex are discussed.