Materials Transactions Online

Materials Transactions, Vol.46 No.08 (2005) pp.1794-1797
© 2005 The Japan Institute of Metals

Eutectic Anomaly of Compound Forming Bi--Te Liquids Studied by Electrical Resistivity Measurements

Yusuke Nakagawa and Toshio Itami

Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan

The electrical resistivity, ρ, of compound forming Bi--Te system in the liquid state was studied by the dc-four probe method. Anomalous behavior of ρ around the intermetallic compound Bi2Te3 in the previous study was not found. Anomalous behaviors of the temperature dependence of ρ, dρ/dT, were found both at two eutectic compositions in this system. These behaviors were discussed based on the effective medium theory of electrical conduction. The concentration fluctuation at the eutectic composition (90 at%Te) grows in the homogeneous liquid phase with the approach to the eutectic temperature.

(Received 2005/4/26; Accepted 2005/7/27; Published 2005/8/15)

Keywords: liquid metals, eutectic alloys, electrical resistivity, concentratyion fluctuations

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