Abstract

The temperature dependence of the magnetoresistance Δρ/ρ of selected magnetic and nonmagnetic RE compounds in fields up to 10 T has been measured. The discussion of the positive magnetoresistance is based 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 minimum in the vicinity of the Curie temperature in accordance to a model calculation of Yamada and Takada. The positive Δρ/ρ contribution in the low temperature region, observed in all magnetic compounds, is due to the dominating classical magnetoresistance in this temperature range.

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