Electron paramagnetic resonance study of Cu2+ in CdCa (CH3COO)(4)center dot 6H(2)O single crystal

The Electron Paramagnetic Resonance spectra of Cu2+ in CdCa (CH3COO)(4) . 6 H(2)O (cadmium calcium tetraacetate hexahydrate) powder and single crystal have been recorded at 300 and 133 K. The angular variation of the spectra i ndicated the substitution of the host Cd2+ with Cu2+. The observed values o f the g and A hyperfine tensors were found to be temperature dependent, and this dependence is discussed and explained on the basis of dynamic Jahn-Te ller effects. The spin-Hamiltonian parameters were found to be axial symmet ric at room temperature, whereas they showed deviations from axial symmetry at low temperature. The g and A tensors where found to be coaxial within t he limits of experimental errors, and the ground state wave functions of th e complex at 300 and 133 K have been constructed.