Electrical resistivity of pyrochlore compounds R2Mo2O7(R =Nd, Sm, Gd, Tb, Y)

The electrical resistivity ofR2Mo2O7(R =Nd, Sm, Gd, Tb, Y) pyrochlores was measured in the temperature range 4.2 to 300 K. Metallic behavior is observed for Nd2Mo2O7, Sm2Mo2O7, and Gd2Mo2O7 which have relatively high magnetic ordering temperatures due to ferromagnetism on the molybdenum sublattice. A clear drop in resistivity is observed near the magnetic ordering point for all metallic materials. A resistance minimum observed at low …