Abstract
EPR and ENDOR measurements have been made to investigate the covalent spin transfer for substitutional V2+ in KMgF3. The hyperfine parameters for the F- ligands are A=-20.99+or-0.02 MHz and B=-5.70+or-0.04 MHz. Hence, the unpaired spin densities in fluorine 2ppi , 2psigma and 2s orbits which arise from covalent transfer to, and overlap with, the V2+3d and 4s orbits are estimated to be fpi =(2.6+or-0.3)%, f'sigma =-(0.3+or-0.2)% and f's=-(0.1+or-0.01) respectively. The covalency model used in interpreting the hyperfine parameters leads to a g factor consistent with the experimental value of 1.972.
Published Version
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