Investigations of the electron paramagnetic resonance g factors for the two Er3+ centers in SrLaAlO4
文献类型：期刊论文
| 作者 | S. Y. Wu ; H. N. Dong |
| 刊名 | Journal of Magnetism and Magnetic Materials
 |
| 出版日期 | 2005 |
| 卷号 | 292页码:248-254 |
| 关键词 | electron paramagnetic resonance (EPR) crystal-field and spin-Hamiltonians Er3+ SrLaAlO4 substitutional disorder optical-spectra theoretical investigations brillouin-scattering superposition-model single-crystals spin-resonance liyf4 crystal parameters cayalo4 |
| ISSN号 | 0304-8853 |
| 中文摘要 | The electron paramagnetic resonance (EPR) g factors for the tetragonal and rhombic Er3+ centers in SrLaAlO4 (SLA) are theoretically investigated by using the perturbation formulas of the g factors for a 4f(11) ion in tetragonal and rhombic symmetries. In these formulas, the contributions to the g factors arising from the second-order perturbation terms and the admixture of various energy levels are included. The crystal-field parameters used in the calculations are determined from the superposition model and the structural data of the tetragonally and rhombically distorted [ErO9](15-) clusters. Based on the studies, the rhombic center may be ascribed to the impurity Er3+ undergoing an off-center displacement Delta X(approximate to 0.37 angstrom) along one of the [110] axes, due to the relaxation effect in the ab plane where one of its nine second-nearest-neighbor La3+ is substituted by an additional Er3+ at the high concentration. The calculated g factors for Er3+ on both Sr2+ and La3+ sites (particularly their average values) show reasonable agreement with the experimental data. This may be regarded as one theoretical indication of the compositional disorder of Sr2+ and La3+ in SLA, in addition to the line broadening of the experimental optical and EPR spectra. The contributions to the g factors from various effects are discussed. (c) 2004 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35128]  |
| 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 | S. Y. Wu,H. N. Dong. Investigations of the electron paramagnetic resonance g factors for the two Er3+ centers in SrLaAlO4[J]. Journal of Magnetism and Magnetic Materials,2005,292:248-254. |
| APA | S. Y. Wu,&H. N. Dong.(2005).Investigations of the electron paramagnetic resonance g factors for the two Er3+ centers in SrLaAlO4.Journal of Magnetism and Magnetic Materials,292,248-254. |
| MLA | S. Y. Wu,et al."Investigations of the electron paramagnetic resonance g factors for the two Er3+ centers in SrLaAlO4".Journal of Magnetism and Magnetic Materials 292(2005):248-254. |
入库方式： OAI收割
来源：金属研究所
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