Temperature and concentration dependences of thermal conductivity of solid solutions of gadolinium and dysprosium sulfides
S.M. Luguev1, N.V. Lugueva1, V.V. Sokolov2
1 Amirkhanov Institute of Physics DSC RAS
2 Nikolaev Institute of Inorganic Chemistry SB RAS
luguev.if@mail.ru
Keywords: thermal conductivity, sulfides of gadolinium and dysprosium
Pages: 343-348
Abstract
Thermal conductivity of a number of solid solutions of gadolinium and dysprosium sulfides has been studied experimentally within the temperature range 80−400 K. The work offers the data on thermal conductivity coefficient and lattice thermal conductivity of the studied samples. It was found that replacement of gadolinium ions by dysprosium ions leads to significant decrease of the samples' thermal conductivity and changes its temperature dependence character due to the resonance scattering of phonons by paramagnetic ions of dysprosium. Influence of this mechanism of phonon scattering conditions the area of anomalous change observed on the concentration dependence of thermal conductivity coefficient.
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