%0 Journal Article
%T Theoretical studies of the EPR parameters for Ni2+ and Co+ in MgO
%A Zhang
%A Zhi- Hong
%A Wu
%A Shao- Yi
%A Xu
%A Pei
%A Li-Li
%A Li
%J Brazilian Journal of Physics
%D 2010
%I Scientific Electronic Library Online
%R 10.1590/S0103-97332010000300020
%X the electron paramagnetic resonance (epr) parameters (g factors and the hyperfine structure constants) for ni2+ and co+ in mgo are theoretically studied from the perturbation formulas of these parameters for a 3d8 ion in octahedral crystal-fields. in the computations, the ligand orbital and spin-orbit coupling contributions are taken into account using the cluster approach. the calculated epr parameters are in good agreement with the experimental data. the larger g factor and the smaller magnitude of the hyperfine structure constant for ni2+ as compared with those for co+ can be attributed to the higher spin-orbit coupling coefficient and the lower dipolar hyperfine structure parameter of the former, respectively.
%K impurity and defects
%K electron paramagnetic resonance
%K ni2+
%K co+
%K mgo.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-97332010000300020&lng=en&nrm=iso&tlng=en