Abstract
The ac susceptibility of La x Nd 1− x F 3 single crystals, for 0 ≤ x ≤ 0.1, has been measured from 1.5 up to 40 K and their dc susceptibility for 0 ≤ x ≤ 1 has been measured from 3 up to 300 K in magnetic fields up to 0.2 T. In both susceptibilities the magnetic fields were applied parallel to the crystallographic a-axis (perpendicular to the c-axis). The effective Bohr magneton number P eff and paramagnetic Curie temperature θ p have been obtained, using the Curie-Weiss law in the temperature range 100–300 K. Also the g-values corresponding to the five Kramers doublets in the 4 I 9/2 ground multiplet of Nd 3+ ion in La x Nd 1− x F 3 have been determined in the direction perpendicular to the c-axis, using the Van Vleck theory of paramagnetic susceptibility. The effect of the dilution of the paramagnetic Nd 3+ ions with diamagnetic La 3+ ions is also discussed.
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