The studies of geometrical microstructure of tetragonal Co2+-V-O centers in KNbO3 and KTaO3 crystals from EPR data
文献类型：期刊论文
| 作者 | W. C. Zheng ; S. Y. Wu |
| 刊名 | Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences
 |
| 出版日期 | 2002 |
| 卷号 | 57期号:12页码:925-928 |
| 关键词 | electron paramagnetic resonance (EPR) crystal- and ligand-field theory defect structure Co2+ KNbO3 KTaO3 electron-paramagnetic resonance superposition model defects ions |
| ISSN号 | 0932-0784 |
| 中文摘要 | From the perturbation formulas for the EPR g factors g(parallel to) and g(perpendicular to) of a 3d(7) ion in tetragonal octahedral crystal field based on a cluster approach, the geometrical microstructures of tetragonal Co2+-V-O centers in KNbO3 and KTaO3 crystals are obtained by fitting the calculated g(parallel to) and g(perpendicular to) to the observed values. It is found that the Co2+ ion in Co2+-V-O centers is displaced away from the oxygen vacancy V-O by 0.3 Angstrom in KNbO3 and by 0.29 Angstrom in KTAO(3). These results are comparable with those of Fe3+-V-O centers in ABO(3) perovskite-type crystals obtained from both the shell-model simulations and the embedded-cluster calculations, and from theoretical studies of EPR data. The experimental values of g(parallel to) and g(perpendicular to) for the tetragonal Co2+-V-O centers in both crystals are also explained reasonably. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36574]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | W. C. Zheng,S. Y. Wu. The studies of geometrical microstructure of tetragonal Co2+-V-O centers in KNbO3 and KTaO3 crystals from EPR data[J]. Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences,2002,57(12):925-928. |
| APA | W. C. Zheng,&S. Y. Wu.(2002).The studies of geometrical microstructure of tetragonal Co2+-V-O centers in KNbO3 and KTaO3 crystals from EPR data.Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences,57(12),925-928. |
| MLA | W. C. Zheng,et al."The studies of geometrical microstructure of tetragonal Co2+-V-O centers in KNbO3 and KTaO3 crystals from EPR data".Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences 57.12(2002):925-928. |
入库方式： OAI收割
来源：金属研究所
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