Electrical and Hall Resistivity in Rare Earth Intermetallic Compounds RAg1-xInx (R: Gd, Tb and Dy)

Abstract

The electrical resistivity and the Hall resistivity in polycrystalline specimens of RAg 1- x In x have been measured from 4.2 K to room temperature and the paramagnetic region up to room temperature, respectively. The spin disorder resistivity at 0 K, ρ m (0), takes a maximum near the boundary of the different magnetic structures in each compound system, and that above the Curie temperature, ρ m (∞), increases with x in Gd system, while it takes a maximum around x =0.3 in Tb and Dy systems. The ordinary Hall coefficient, R 0 , is positive for all the compounds. On the other hand, the spontaneous Hall coefficient, R s , is negative for all the compounds except GdAg and TbAg and its magnitude increases with x for x ≥0.1 in all the systems. The results have been discussed on the basis of the localized spin model.