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New superconducting intermetallic compounds with a chemical formula of MRhGe2 (M=Zr, Hf) were discovered, and their crystallographic, magnetic, and electric properties were investigated. MRhGe2 crystallizes in an orthorhombic TiMnSi2 structure of space group Pbam and shows a superconducting transition at about 3 K. The magnetic susceptibility measurement indicated bulk superconductivity of MRhGe2. The superconducting parameters of MRhGe2 (M=Zr, Hf) indicate that they are type-II superconductors in the category of the BCS theory. [Copyright &y& Elsevier]

Seebeck coefficient, electrical resistivity, and magnetization measurements have been made on Fe3-xVxSi alloys with 0.6≤x≤1 in comparison with those of Fe3-xVxAl. Negative large values of the Seebeck coefficient are observed which indicates that the electronic state of Fe3-xVxSi is likely semimetallic. The concentration dependence of the Seebeck coefficient on the vanadium content at 200 and 500 K is consistent with the developing process of the pseudogap formation and the enhancement of the Fermi energy. Magnetization curves of Fe2.20V0.80Si at low temperatures show a ferromagnetic character and indicate the Curie temperature being between 100 and 200 K, while we observed positive temperature coefficient of the electrical resistivity up to room temperature in contrast with those of Fe3-xVxAl. [Copyright &y& Elsevier]