| Theoretical studies of the g factors for the tetragonal and orthorhombic Er3+ sites in ErBa2Cu3O7-delta superconductors | |
| S. Y. Wu; H. N. Dong | |
| 2004 | |
| Source Publication | Journal of Alloys and Compounds
 |
| ISSN | 0925-8388 |
| Volume | 379Issue:1-2Pages:36-40 |
| Abstract | The EPR g factors for the tetragonal and orthorhombic Er3+ sites in ErBa2Cu3O7-delta high-T-c superconductors are theoretically studied by using the perturbation formulas of the g factors for a 4f(11) ion in tetragonal and orthorhombic symmetries. In these formulas, the contributions to the g factors from the second-order perturbation terms and the admixture of various states are taken into account. The relevant crystal-field parameters are determined from the local geometrical relationship of the magnetic Er3+ sites and the superposition model (SPM). The theoretical g factors for Er3+ of both symmetries are in agreement with the observed values, by adjusting the related SPM parameters. The lowest Kramers doublets are found to be, respectively, (Gamma(7) + Gamma(8)) and (Gamma(5) + Gamma(6)) for the tetragonal and orthorhombic ErBa2Cu3O7-delta superconductors. The above studies may be helpful to understand the change of the Er3+ anisotropy from Ising- to XY-like as the symmetry varies from orthorhombic to tetragonal. (C) 2004 Elsevier B.V. All rights reserved. |
| description.department | univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. chongqing inst posts & telecommun, coll elect engn, chongqing 400065, peoples r china.;wu, sy (reprint author), univ elect sci & technol china, dept appl phys, chengdu 610054, peoples r china;wushaoyi@netease.com |
| Keyword | Electron Paramagnetic Resonance (Epr) Crystal-fields And Spin Hamiltonians Er3++ High-t-c Superconductors Superposition-model Phase-stability Rare-earth Ion Yba2cu3oy Ca Re |
| URL | 查看原文 |
| WOS ID | WOS:000224132600009 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/35619 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | S. Y. Wu,H. N. Dong. Theoretical studies of the g factors for the tetragonal and orthorhombic Er3+ sites in ErBa2Cu3O7-delta superconductors[J]. Journal of Alloys and Compounds,2004,379(1-2):36-40. |
| APA | S. Y. Wu,&H. N. Dong.(2004).Theoretical studies of the g factors for the tetragonal and orthorhombic Er3+ sites in ErBa2Cu3O7-delta superconductors.Journal of Alloys and Compounds,379(1-2),36-40. |
| MLA | S. Y. Wu,et al."Theoretical studies of the g factors for the tetragonal and orthorhombic Er3+ sites in ErBa2Cu3O7-delta superconductors".Journal of Alloys and Compounds 379.1-2(2004):36-40. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment