Single crystal EPR and optical studies of paramagnetic ions doped zinc potassium phosphate hexahydrate--Part II: VO(II)--a case of substitutional site

摘要

Single crystal electron paramagnetic resonance (EPR) studies were carried at room temperature for VO(II) doped zinc potassium phosphate hexahydrate. The results indicate that the paramagnetic impurity has entered the lattice only substitutionally, asconfirmed by the single crystal rotations. The spin Hamiltonian parameters calculated from the spectra are g_H = 1.9356, g_(perpendicular) = 1.9764, A_H = 200.9 G and A_(perpendicular) = 76.5 G. The optical absorption spectrum exhibits three bands (800,670 and 340 nm) suggesting the C_(4v) symmetry and the optical parameters evaluated are Dq = 1492, Ds = - 3854 and Dt = 186 cm~(-1).