Studies of the EPR Parameters and Local Structure for the Cu2+ Center in Lanthanum Magnesium Nitrate
| Periodical | Defect and Diffusion Forum (Volumes 305 - 306) |
|---|---|
| Main Theme | Defects and Diffusion in Metals XII |
| Edited by | David J. Fisher |
| Pages | 85-88 |
| DOI | 10.4028/www.scientific.net/DDF.305-306.85 |
| Citation | Min Quan Kuang et al., 2010, Defect and Diffusion Forum, 305-306, 85 |
| Online since | October, 2010 |
| Authors | Min Quan Kuang, Shan Xiang Zhang, Pei Xu |
| Keywords | Cu2+, Defect Structures, Electron Paramagnetic Resonance (EPR), Lanthanum Magnesium Nitrate |
| Price | US$ 28,- |
The electron paramagnetic resonance parameters (g-factors and the hyperfine structure constants) for the Cu2+ center in lanthanum magnesium nitrate (LMN) are theoretically studied from the conventional perturbation formulas of these parameters for a 3d9 ion in tetragonally elongated octahedra. The studied complex is found to exhibit the slight tetragonal elongation (characterized by the relative elongation ratio ρ 4%) due to the Jahn-Teller effect, which may entirely conceal the original trigonal distortion of the host Mg2+ site in LMN. The conventional formulas containing only the metal orbital and spin-orbit coupling contributions are proved to be valid for the Cu2+ center in view of the weak covalency and ligand spin-orbit coupling interactions. This defect is also compared with the similar Cu2+ center of the Jahn-Teller nature on the octahedral interstitial site in the CdSe nanocrystals.