ELECTRON-PARAMAGNETIC-RESONANCE (EPR) AND OPTICAL-ABSORPTION SPECTRA OF VO2-NA2SO4-ZNSO4 GLASSES( IONS IN K2SO4)

Electron Paramagnetic Resonance (EPR) spectra of K2SO4-Na2SO4-ZnSO4 gl asses containing 3 mol.% of vanadi um sulphate have been studied. Spin -Hamiltonian parameters (g(parallel to), g(perpendicular to) A(paralle l to) A(perpendicular to)), the dipolar hyperfine coupling parameter ( P), the Fermi contact interaction parameter (K) and the tetragonality of the V4+ site (Delta g(parallel to)/Delta g(perpendicular to)) have been calculated. The optical absorption spectra of VO2+ ions doped the se glasses show three bands. By correlating the EPR and optical spectr al data, the molecular orbital parameters have been evaluated. Results agree with similar studies made earlier.