ESR and optical studies of Cu 2+ doped zinc glutamate dihydrate

Abstract

The ESR study of the Cu 2+ doped zinc glutamate dihydrate is carried out at room temperature. Two magnetically nonequivalent sites for Cu 2+ are observed. The spin Hamiltonian parameters are determined with the fitting of spectra to rhombic symmetry crystalline field. The parameters are as follows: Cu 2+(I): g x = 2.0170 ± 0.0002, g y = 2.0768 ± 0.0002, g z = 2.2334 ± 0.0002, A x = (74 ± 2) × 10 −4, A y = (99 ± 2) × 10 −4, A z = (134 ± 2) × 10 −4 cm −1and Cu 2+(II): g x = 2.0180 ± 0.0002, g y = 2.0550 ± 0.0002, g z = 2.1633 ± 0.0002, A x = (100 ± 2) × 10 −4, A y = (100 ± 2) × 10 −4, A z = (115 ± 2) × 10 −4 cm −1. The ground state wave function is also determined. The g-anisotropy is evaluated and compared with the experimental value. Using the data of optical absorption study undertaken at room temperature the nature of bonding in the complex is also discussed.