Crystalline Electric Field Effects on the Resistivity of PrCu₅ and PrCu₆

抄録

The electrical resistivity of singlet-ground-state compounds of praseodymium, PrCu₅ and PrCu₆, has been measured at temperatures between 1.5 K and 300 K. The experimental results showed the effects of crystalline-electric-field splitting of the 4f state of Pr ions. In PrCu₅, it was found from a comparison with theory that the aspherical Coulomb-charge scattering of conduction electrons by Pr ions makes an important contribution to the resistivity.