Abstract
Thermoelectric materials generate an electromotive force when submitted to a thermal gradient with an efficiency scaled by the so-called figure of merit: Z= α 2 σ/ κ, where α is the Seebeck coefficient, σ the electronic conductivity and κ the thermal conductivity. Theoretical considerations have shown that a large value of Z requires not only a small value of κ but also a large effective mass of charge carriers. The first condition is met in filled skutterudites, which have been studied extensively for this reason. The second condition suggests we focus our attention on skutterudites filled with an anomalous rare-earth element such as cerium, presenting heavy fermion characteristics. In this context, we report in this paper a study of the magnetic properties of CeFe 4Sb 12 and their evolution upon cerium dilution.
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