Theoretical Investigations on the Anomaly of the g Factors and Local Structure for LaCuO3-delta
文献类型：期刊论文
| 作者 | M. Q. Kuang ; S. Y. Wu ; B. T. Song ; X. F. Hu |
| 刊名 | Journal of Superconductivity and Novel Magnetism
 |
| 出版日期 | 2012 |
| 卷号 | 25期号:7页码:2489-2493 |
| 关键词 | Electronparamagnetic resonance (EPR) Defect structure Cu2+ Crystal-fields and spin Hamiltonians LaCuO3-delta electron-paramagnetic-resonance atomic screening constants fe-57 mossbauer probe epr parameters scf functions cu2+ ions doped cds perovskite crystals copper |
| ISSN号 | 1557-1939 |
| 中文摘要 | The anomaly of the g factors and local structure for LaCuO3-delta are theoretically investigated from the perturbation formulas of the g factors for a 3d (9) ion in tetragonally distorted tetrahedra based on the cluster approach including the ligand contributions. The anomaly (g (ayen)> 2 > g (aSyen)) of the g factors is ascribed to the paramagnetic Cu2+ (originating from the host diamagnetic Cu3+ capturing one electron under oxygen deficiency) in a tetragonally elongated tetrahedron. The tetragonal distortion angle is found to be about 3.56A degrees (i.e., the Cu2+-O2- bond angle related to the C-4 axis is 3.56A degrees smaller than that (a parts per thousand 54.74A degrees) of a regular tetrahedron) due to the Jahn-Teller effect. The coordination number decreases from the original six for the host octahedral Cu3+ in LaCuO3-delta to four for the tetrahedral impurity Cu2+ in LaCuO3-delta arising from incomplete Cu2+-O2- bonding due to oxygen deficiency and some Cu2+ locating in the surface of the sample. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60036]  |
| 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 | M. Q. Kuang,S. Y. Wu,B. T. Song,et al. Theoretical Investigations on the Anomaly of the g Factors and Local Structure for LaCuO3-delta[J]. Journal of Superconductivity and Novel Magnetism,2012,25(7):2489-2493. |
| APA | M. Q. Kuang,S. Y. Wu,B. T. Song,&X. F. Hu.(2012).Theoretical Investigations on the Anomaly of the g Factors and Local Structure for LaCuO3-delta.Journal of Superconductivity and Novel Magnetism,25(7),2489-2493. |
| MLA | M. Q. Kuang,et al."Theoretical Investigations on the Anomaly of the g Factors and Local Structure for LaCuO3-delta".Journal of Superconductivity and Novel Magnetism 25.7(2012):2489-2493. |
入库方式： OAI收割
来源：金属研究所
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