Electron Paramagnetic Resonance Study of Cu2+ in CdCa(CH3COO)4·6H2O Single Crystal

Abstract

The Electron Paramagnetic Resonance spectra of Cu2+ in CdCa (CH<inf>3</inf>COO)4 · 6H<inf>2</inf>O (cadmium calcium tetraacetate hexahydrate) powder and single crystal have been recorded at 300 and 133 K. The angular variation of the spectra indicated the substitution of the host Cd2+ with Cu2+. The observed values of 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-Teller effects. The spin-Hamiltonian parameters were found to be axial symmetric at room temperature, whereas they showed deviations from axial symmetry at low temperature. The g and A tensors where found to be coaxial within the limits of experimental errors, and the ground state wave functions of the complex at 300 and 133 K have been constructed.