Abstract
The crystal-field parameters V m n of PrCu 2, NdCu 2, TbCu 2, DyCu 2, HoCu 2 and ErCu 2 were calculated from the point-charge model and a least-squares fit to the reciprocal susceptibilities along the principal axes. The results of calculation are in good agreement with the experimental values estimated from the anisotropic paramagnetic Curie temperatures on the basis of the molecular field approximation. The influence of the orthorhombic crystal field of RCu 2 compounds on their paramagnetic susceptibility along the principal axes was calculated. At the higher temperature range, the anisotropic Curie-Weiss law is valid. At moderate temperatures, for all intermetallic compounds, a deviation of the reciprocal paramagnetic susceptibility from the Curie-Weiss law was found. Its magnitude is in good agreement with experiment.
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