Regensburg 2019 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 36: Liquid and Amorphous Metals
MM 36.1: Vortrag
Donnerstag, 4. April 2019, 10:15–10:30, H46
The effect of temperature and composition on resistivity of Bi-Ga and Ga-In binary alloys — •Yuri Kirshon1, Guy Makov1, and Eyal Yahel2 — 1Ben-Gurion University of the Negev, Beersheba, Israel — 2NRCN, Beer-Sheva, Israel
The electrical resistivity of liquid metals and alloys is a probe of the electronic and structural properties of the system. The present study focused on the development of an experimental apparatus to measure the electrical resistivity of liquid metals and its application to selected metal and alloy systems. The presentation consists of two parts: the first reports on the design of the experimental measuring system, with some emphasis on the importance of component materials. The second part reports on measurements of resistivity in pure Bi, Ga and In, also, Bi-Ga and Ga-In binary alloys were tested as well. The resistivity of the alloys was measured for selected compositions over wide range of temperatures. In all the studies the absolute resistivity was determined up to an error of 3% and the results are with good agreement with previous studies. A clear linear correlation between resistivity and temperature is obtained for tested pure metals and some tested alloys. For Bi-Ga the resistivity and its temperature coefficients are found to vary smoothly with composition as suggested by simple theoretical models. In contrast, for Ga-In alloys the composition dependence is non-monotonous. In addition, the near eutectic alloys display anomaly which point toward a structural transition in the liquid.