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Thermal conductivity of the SmxTm1-xS system

Identifieur interne : 003480 ( Main/Exploration ); précédent : 003479; suivant : 003481

Thermal conductivity of the SmxTm1-xS system

Auteurs : V. V. Popov [Russie] ; A. G. Kasymova [Russie] ; B. M. Buttaev [Russie] ; A. V. Golubkov [Russie] ; I. A. Smirnov [Russie] ; A. Tybulewicz

Source :

RBID : Pascal:94-0329470

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English descriptors

Abstract

The thermal conductivity κ of the SmxTm1-xS system, exhibiting a semiconductor-metal phase transition at x ≃ 0.75-0.84, was determined in the temperature range 18-330 K. The thermal conductivity of the compositions with x > 0.8 was of phonon nature. An increase in the Tm content in the range x = 0-0.78 increased the electron contribution to κ. The Lorenz number L was anomalously large (L/L0 ≃ 2-3) for all the metallic compositions of SmxTm1-xS


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Le document en format XML

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<term>Semiconductor metal transition</term>
<term>Temperature dependence</term>
<term>Temperature range 13-65 K</term>
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<div type="abstract" xml:lang="en">The thermal conductivity κ of the Sm
<sub>x</sub>
Tm
<sub>1-x</sub>
S system, exhibiting a semiconductor-metal phase transition at x ≃ 0.75-0.84, was determined in the temperature range 18-330 K. The thermal conductivity of the compositions with x > 0.8 was of phonon nature. An increase in the Tm content in the range x = 0-0.78 increased the electron contribution to κ. The Lorenz number L was anomalously large (L/L
<sub>0</sub>
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<sub>x</sub>
Tm
<sub>1-x</sub>
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