[Investigation of optical and EPR spectra of ZnO : V3+ crystal].
In the present paper, the 45 X 45 energy matrix of the 3d2 ions in trigonal symmetry with the strong-field-coupling mechanism is established. The forty-five optical energy levels and five EPR parameters (including the zero-field splitting D, g factors g//, g perpendicular and hyperfine structure constants A//, A perpendicular) of ZnO : V3+ cryst are calculated from the diagonalization of this complete energy matrix. The calculated results are in agreement with the observed values. Based on the calculation, it was found that the local structure of V3+ impurity center is different from the corresponding structure in the host crystal, i. e., the V3+ ion in ZnO does not occupy the exact Zn2+ site, but is displaced by DeltaZ approximately 0.003 nm along the c3 axis. The reasonableness of these results is discussed.
Feng
Wen-Lin
WL
Department of Applied Physics, Chongqing Institute of Technology, Chongqing 400050, China. wenlinfeng@126.com
Wu
Xiao-Xuan
XX
Zheng
Wen-Chen
WC