Abstract
The temperature dependence of the magnetic susceptibility χ(T) of intermetallic compounds of Er with In in a wide temperature range from 20 to 1600°C inherent in the solid state and melting process of the materials under review was studied for the first time by the Faraday method. For all test compounds, the temperature dependence was found to be approximated by the Curie-Weiss linear law both in a solid and liquid state. The Curie paramagnetic temperature, Curie-Weiss constants, and effective magnetic moment numbers per Er atom were calculated by computer processing of the χ−1(T) data, using the least-squares technique. A semiempirical estimation of the indirect exchange interaction parameter showed the test compounds to be characterized by exchange interactions of the Ruderman-Kittel-Kasuya-Yosida type.
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