A universal dependence for thermal conductivity of metals and dilute alloys |
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Authors: | K. Balcerek Cz. Marucha J. Rafałowicz R. Wawryk |
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Affiliation: | (1) Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, Wroclaw 2, Poland |
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Abstract: | A universal curve relating the maximum of thermal conductivity and its respective temperature with the residual electrical resistivity has been proposed for metals and dilute alloys. Based on the equation of that curve, a comparative analysis of selected literature data of thermal conductivity of metals, which have residual electrical resistivity in the range 10–11<0<10–5. cm, have been performed. Using the data for 33 metals, confirmation of the Wiedemann-Franz law for the impurity component/T of thermal conductivity was obtained, which means that th/el1, whereth andel are the parameters of the electron-lattice defect interaction obtained from measurements of thermal and electrical conductivity, respectively. Examples of the failure of the Wiedemann-Franz law are also presented, exhibiting the values ofth/el in the range 0.16 to 25. Measurements of thermal conductivity in the range 2 to 20 K and determination of the residual electrical resistivity for the samples of Cd doped with Zn and quenched were performed, resulting in valuesth/el1. |
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Keywords: | alloys electrical resistivity low temperature metals thermal conductivity Wiedemann-Franz law |
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