EPR of Cu²⁺-Doped (NH₄)₂SO₄

Abstract

An electron paramagnetic resonance investigation of Cu 2+ -doped (NH 4 ) 2 SO 4 single crystals has been made at room temperature. The spectra corresponding to the complex (Cu 2+ ion associated with a (NH 4 ) + vacancy) making an angle of 20° with the crystalline b -axis in b - c plane, are observed and are analysed in terms of the parameters of the spin-Hamiltonian. From the obtained experimental data, the ground state wave function of the Cu 2+ ion has been constructed. Then the value of δ g = g y - g x has been calculated and compared with the measured value.