| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000425397 |
| ISSN: | 0035-001X |
| Authors: | Lin, J.Z1 Zhang, B.F1 Yang, Y1 Xiao, P1 Zhao, Y1 |
| Institutions: | 1Jiangsu University of Science and Technology, Department of physics, Nantong. China |
| Year: | 2016 |
| Season: | Jul-Ago |
| Volumen: | 62 |
| Number: | 4 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | The local structure of the Cu2+ center in mixed alkali cadmium phosphate (10Li2O-10Na2O-20CdO-59.5P2O5) glass is theoretically investigated from the optical spectral data and high-order perturbation formulas of the electron paramagnetic resonance (EPR) parameters (g-factors g║,g┴ and the hyperfine structure constants A║,A┴ ) for a 3d9 ion in a tetragonally elongated octahedron. In these formulas, the ligand orbital and spin-orbit coupling contributions are taken into account based on the cluster approach in view of moderate covalency. The required crystal-field parameters are determined by the superposition model. According to the calculations, the impurity-ligand distances parallel and perpendicular to the C4 axis of [CuO6] 10- cluster are found to be, respectively, R ║ ≈2.051 Å and R ┴ ≈ 2.029 Å due to Jahn-Teller effect. Based on the above local structure data, the optical spectra are satisfactorily interpreted. The signs of A║ and A┴ for the Cu 2+ center are suggested in the discussion |
| Disciplines: | Física y astronomía |
| Keyword: | Física, Giros, Vasos de fosfato |
| Keyword: | Campos de cristal, Resonancia electrónica paramagnética, Spin hamiltonians, Crystal fields, Electron paramagnetic resonance, Phosphate glass |
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