ESR and optical study of Mn2+ doped diglycine barium chloride monohydrate

ESR study of Mn2+ doped Diglycine Barium Chloride Monohydrate 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, A, B, D, E, and a are 1.9922 +/- 0.0002, 89 +/- 2x10(-4) cm(-1), 88 +/- 2x10(-4) cm(-1), 237 +/- 2x10(-4) cm(-1), 80 +/- 2x10(-4) cm(-1), and 5 +/- 1x10(-4) cm(-1) respectively. The optical absorption study of the crystal has also been done. The observed bands are assigned as transitions from the (6)A(1g)(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, D-q, and a and the values found for the parameters are B=771 cm(-1), C=3053 cm(-1), Dq=755 cm(-1), and alpha=76cm(-1). On the basis of the data obtained the surrounding crystalline field and the nature of metal-ligand bonding have been discussed.