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In order to investigate the magnetic behavior of praseodymium, measurements were made on the resistivity, the magnetoresistance, and the magnetic susceptibility of the metal and its dilute alloys. The parameters of the crystalline field splitting of the ground state of the Pr 3+ ion in the d-hcp structure are estimated by analyzing the low temperature susceptibility of the dilute La-Pr alloys on the basis of the point charge model. The parameter of the exchange interaction between conduction electrons and Pr ion is estimated from the high temperature susceptibility data using the Ruderman-Kittel-Kasuya-Yosida theory. The magnetism of praseodymium metal, particularly the nature of the antiferromagnetic state, is discussed in terms of these parameters mentioned above. The conclusion obtained is: (a) the Pr ion at the cubic site of praseodymium has no magnetic moment at low temperature, and (b) the sinusoidal arrangement of the magnetic moment occurs only among the ions at the hexagonal site. The resistance minimum phenomenon observed in dilute Pr-Ce alloys seems to support this conclusion.
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Nagasawa et al. (1967) studied this question.
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