The Thermopowers and Resistivities of Copper Alloyed with Homovalent and Polyvalent Impurities and the Validity of the Nordheim-Gorter Relation
Although the Nordheim-Gorter rule (NGR) has been used for many years to analyse and predict the diffusion thermopower of dilute alloys, it is surprising that no very detailed examination of its validity has been performed over a wide range of temperatures. Its apparent success in predicting the observed linearity of the diffusion thermopower SD versus reciprocal of the total electrical resistivity (ρ−1) for a series of dilute alloys of different composition has led to a general acceptance of the rule, but no detailed examination has been made to test that the intercept So NGR, (the characteristic thermopower of the solute) is linear in T as the NGR predicts. However, failure of the NGR was first indicated by Guénault1 who showed that SD NGR T−1 measured at room temperature in noble metal systems was considerably different from the value obtained on the same alloys at very low temperatures.
KeywordsElectrical Resistivity Copper Alloy Detailed Examination Electronic Thermal Conductiv Apparent Success
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- 5.R.P. Huebener, Phys. Rev. 135, Al281 (1964).Google Scholar