Abstract
Abstract According to the analytic expressions for the spin-lattice coupling coefficients G11 and G44 in cubic symmetry for d8 ions derived from a uniform method based on the relations between the coefficients G 11 and the stress dependence of zero-field splitting, the coefficients G11 and G44 for Ni2+ ions on KMgF3 and KZnF3 crystals have been calculated by using two adjustable parameters (the average covalency) reduction factor N and ligand dipole p) obtained from electron paramagnetic resonance and optical absorption spectra. The absolute values of the calculated results are in agreement with the data obtained from spin-lattice relaxation experiments, and the signs of these coefficients are predicted to be positive from the theoretical calculation.
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