MAGNETORESISTANCE IN MAGNETIC AND NONMAGNETIC RARE-EARTH COMPOUNDS

The temperature dependence of the magnetoresistance Delta rho/rho of s elected magnetic and nonmagnetic RE compounds in fields up to 10 T has been measured. The discussion of the positive magnetoresistance is ba sed on Kohler's rule. It was found that deviations from Kohler's rule at low temperatures depend on the magnitude of the individual residual resistivity. Ferromagnetic compounds exhibit negative values and a mi nimum in the vicinity of the Curie temperature in accordance to a mode l calculation of Yamada and Takada. The positive Delta rho/rho contrib ution in the low temperature region, observed in all magnetic compound s, is due to the dominating classical magnetoresistance in this temper ature range.