The electron paramagnetic resonance parameters g factors g(parallel to) and g(perpendicular to) of Sm3+ and hyperfine structure parameters All and A-L of Sm-147(3+) and Sm-149(3+) isotopes in La2Mg3(NO3)(12)center dot 24H(2)O crystal are calculated from the perturbation formulas of EPR parameters for 4f(5) ion in trigonal symmetry. In these formulas, the J-mixing among the H-6(J) (J=5/2, 7/2 and 9/2) states via crystal-field interactions, the mixtures among the states with the same J value via spin-orbit coupling interaction, and the interactions between the lowest Kramers doublet Gamma gamma and the same irreducible representations in the other 11 Kramers doublets Gamma x via crystal-field and orbital angular momentum (or hyperfine structure) interactions are considered. The crystal-field parameters for the studied Sm3+ centre are obtained from the superposition model. The theoretical calculated results are in reasonable agreement with the experimental values. (C) 2007 Elsevier B.V. All rights reserved.
- electron paramagnetic resonance
- superposition model
- La2Mg3(NO3)(12)center dot 24H(2)O