We report the transport properties, including electrical resistivity (r) and Seebeck coefficient (S) of Ge-substituted MnSi1 xGex (with x 1⁄4 0, 0.02, 0.05, and 0.10) alloys as a function of temperature between 10 and 300K. It was found that the partial substitution of Ge at Si site has a surprisingly weak effect on the ferromagnetic transition temperature TC in MnSi, indicating that the negati...
