Transport and Magnetic Properties of U 3Sn 2 and U 3Sn5

Electrical resistivity, thermoelectric power, Hall coefficient, magnetic susceptibility and magnetization of binary uranium-tin compounds U 3 Sn 2 and U 3 Sn 5 have been measured in the temperature range of 1.3 K to room temperature. The experimental results indicate that both U 3 Sn 2 and U 3 Sn 5 are ferromagnetic below about 60 K and 45 K, respectively, although for U 3 Sn 5 a some kind of magnetic order starts below about 75 K.