Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9756913 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2005 | 4 Pages |
Abstract
From the high-order perturbation formulas of EPR parameters (zero-field splitting D, g factors gâ¥, g⥠and hyperfine structure constants Aâ¥, Aâ¥) based on the two spin-orbit coupling parameter model for 3d3 ions in trigonal symmetry, the EPR parameters of Cr3+ and V2+ ions in HfS2 crystals are calculated. From the calculations, it is found that the local trigonal distortion angle θ of impurity center in HfS2:Cr3+ is smaller than that in HfS2:V2+. The dominant cause of the small zero-field splitting |D| and g-anisotropy |Îg| = |gâ¥Â â gâ¥| in HfS2:Cr3+ (compound to HfS2:V2+) is due to the small local trigonal distortion angle θ rather than to the small impurity-ligand distance R in HfS2:Cr3+.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Zhou Qing, Zheng Wen-Chen, Wu Xiao-Xuan, Mei Yang,