Abstract:

The EPR g-factor for clusters (CrO₄)^4- in Ba₃Ge₂O₇　crystals was studied from the complete high-order perturbation formulae. The results were in more agreement with the experimental value by a charge-transfer model as compared with a double spin-orbit(SO) coupling parameter model. The difference ofg is 0.0003 between the calculated values and the experimental values from thecharge-transfer model, and is 0.0249 from the double spinorbit coupling parameter model.

Key words: local structure; electron paramagnetic resonance; perturbation expression; SO coupling