Pressure dependence of the thermal and electrical conductivities of the intermetallic compounds AuCu and AuCu3
1988 (English)In: Journal of Physics and Chemistry of Solids, ISSN 0022-3697, Vol. 49, no 4, 441-450 p.Article in journal (Refereed) Published
The thermal diffusivity, a, electrical resistivity, ρ, and Seebeck coefficient, S, of ordered and disordered AuCu3 and AuCu have been measured as functions of T and P in the range 100–300 K and 0–2 GPa, and the thermal conductivity, λ, has been calculated from the data for a. The experimental data for ρ agree well with literature data. The ρ dependence of ρ and λ differs significantly between ordered and disordered specimens, but apart from the effect of impurity scattering the disordered materials behave much like the noble metals. For the temperature-dependent part of p (and λ) the P dependence differs by a factor of 2–3 between ordered and disordered states. This is shown to result from the difference in electron band structure, as reflected also in the thermoelectric parameter ξ. The P dependence of the relatively large lattice thermal conductivity of these materials causes the Lorenz ratio L = λρ/T to increase with ρ in all cases.
Place, publisher, year, edition, pages
1988. Vol. 49, no 4, 441-450 p.
Thermal diffusivity, thermal conductivity, high pressure, electrical resistivity, Lorenz function, intermetallic compounds, alloys, gold-copper, copper-gold, AuCu, AuCu3, structural order, disorder, Seebeck coefficient, thermoelectric power, thermopower, lattice thermal conductivity
Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-26759DOI: 10.1016/0022-3697(88)90105-9OAI: oai:DiVA.org:umu-26759DiVA: diva2:273952