Year: 1973
Type: article
Abstract: The magnetic susceptibilities and electric resistivities of liquid copper alloys of Cu-Bi, Cu-Sn and Cu-In were measured as functions of compositions at temperatures in the neighborhood of 1000°C.In the liquid Cu-Bi alloy, the observed magnetic susceptibility and electric resistivity were well explained under the assumption of a random distribution of Cu and Bi ions in an electron gas atmosphere consisting of their valence electrons.In the liquid Cu-Sn and Cu-In alloys, an anomalous behaviour of magnetic susceptibility and electric resistivity was observed. It was shown that the observed deep valleys of diamagnetism in the magnetic susceptibility curves of both liquid alloys corresponded to the peaks of heat evolution in the heat of mixing curves for the same alloys observed in our previous report. From the comparison of the observed curves of magnetic susceptibility with theoretical curves calculated by taking account of a contribution from nR pseudo-molecules, it was found that about two electrons were localized in the pseudo-molecule for both liquid alloys near 1100°C and the observed deep valley of diamagnetism corresponded to the distribution curve nR of pseudo-molecules.Electric resistivities for both liquid alloys are given by the sum of contributions from scattering by randomly distributed free ions and pseudo-molecules. The former contribution ρ1 can be calculated using a hard sphere model with the Ashcroft potentials, and the latter contribution ρ2 can be assumed to be in proportion to the distribution function nR of the pseudo-molecule in the liquid alloy on the basis of its flexible structure.For both alloys, such a proportional relationship was shown to be reasonable by comparing the nR curve with a curve of (ρ−ρ1) which was obtained by subtracting ρ1 from the observed total resistivity.
Institution: Tohoku University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2606491139