EPR theoretical study of local lattice structure in ZnS:Cr~(2+)system

摘要

By analyzing the EPR parameters a, D and F of Cr~(2+) ion located at tetrahedral site in ZnS, the local structure around Cr~(2+) in the crystal has been investigated on the basis of the complete energy matrix for a d~4 configuration in a tetragonal ligand-field within a strong-field-representation. It is shown that there exists an expansion distortion in the local lattice structure. From EPR calculation, the distortion parameters ΔR = 0.13 A and Δθ= 1.417° are determined.