ESR and optical study of Mn2+-doped zinc lactate trihydrate

ESR study of Mn2+-doped Zinc Lactate Trihydrate (ZLT) single crystals has been done at room temperature. The Mn2+ spin-Hamiltonian parameters have been evaluated employing a large number of resonant line positions observed for different orientations of the external magnetic field. The values of g  , AA, ℬ, D, E and a are 1.9769±0.0002, 89±2×10−4, 84±2×10−4, 330±2×10−4, 103±2×10−4 and 10±1×10−4 cm−1, respectively. The optical absorption study of the crystal has also been done. The observed bands are assigned as transitions from the 6A1g(S) ground state to various excited quartet levels of a Mn2+ ion in a cubic crystalline field. These bands are fitted with four parameters B, C, Dq and α   and the values found for the parameters are B=778cm-1, C=3083cm-1, Dq=760cm-1, and α=76cm-1. On the basis of the data obtained the surrounding crystalline field and the nature of metal–ligand bonding have been discussed.