Abstract
We report on the resistivity and thermopower measurements together with the microstructural investigations of two highly concentrated alloys of the UxY1−xRu2Si2 alloy system, for x=0.5 and x=0.67, nominally. Microstructural analysis shows the existence of two different crystalline phases at the room temperature: the solid solution UcY1−cRu2Si2 (c<x) phase and the phase which can be represented by chemical formula URu2Si. We show that the uranium single ions dissolved in the YRu2Si2 matrix exhibit the ordinary or single-channel Kondo effect described by the Coqblin–Schrieffer Hamiltonian. In the light of the obtained results, the URu2Si2 compound is discussed.
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