Abstract
X-band (∼9.8 GHz) electron paramagnetic resonance (EPR) measurement at ambient temperature in three mutually perpendicular planes have been carried out on a single crystal of Cu 2+ doped mixed ligand complex of Ni(II) with saccharin and nicotinamide [Ni(Nic) 2(H 2O) 4](sac) 2. The angular dependent spectra showed that the Cu 2+ ion enters Ni 2+ sites in the lattice and distorted local environment of Ni 2+ site. The principal g and A values, covalency parameter ( α′ 2), mixing coefficients ( α and β) and Fermi contact term ( K) have been evaluated from the EPR analysis. The ground-state wave function of the Cu 2+ ion has been constructed using the α′ 2, α and β values. The nature of the distortion present in the lattice is obtained from the values of the mixing coefficients.
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