Magnon energy gap in a three-layer ferromagnetic superlattice
文献类型：期刊论文
| 作者 | R. K. Qiu ; Z. D. Zhang ; L. Han ; G. K. Ma ; X. D. Zhang |
| 刊名 | Physica Status Solidi B-Basic Solid State Physics
 |
| 出版日期 | 2007 |
| 卷号 | 244期号:12页码:4678-4687 |
| 关键词 | spin-wave theory magnetically structural symmetry layered heisenberg ferrimagnets periodic elastic composites acoustic band-structure magnetization magnetoresistance 3-sublattice multilayers dependence |
| ISSN号 | 0370-1972 |
| 中文摘要 | The magnon energy band in a three-layer ferromagnetic superlattice is studied by using the linear spin-wave approach and Green's function technique. It is found that two modulated energy gaps exist in the magnon energy band along K(x) direction perpendicular to the plane of the superlattice. The spin quantum numbers and the interlayer exchange couplings all affect the two energy gaps. The disappearance of one of the energy gaps corresponds to a high symmetry among the interlayer exchange couplings, while the vanishing of another energy gap corresponds to a high symmetry of the system, which belongs to the type III Shubnikov group or the polychromatic group of magnetic group. This magnetically structural symmetry includes not only the symmetry of crystallographic point-groups or space-groups, but also the symmetry of strength and direction of spins. Comparing with the previous results for a three-layer ferrimagnetic superlattice, it is concluded that the energy gap of the ferromagnetic/ferrimagnetic superlattices is dominated by different symmetries originated from ferromagiietic/antiferromagnetic interlayer exchange couplings. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33791]  |
| 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 | R. K. Qiu,Z. D. Zhang,L. Han,et al. Magnon energy gap in a three-layer ferromagnetic superlattice[J]. Physica Status Solidi B-Basic Solid State Physics,2007,244(12):4678-4687. |
| APA | R. K. Qiu,Z. D. Zhang,L. Han,G. K. Ma,&X. D. Zhang.(2007).Magnon energy gap in a three-layer ferromagnetic superlattice.Physica Status Solidi B-Basic Solid State Physics,244(12),4678-4687. |
| MLA | R. K. Qiu,et al."Magnon energy gap in a three-layer ferromagnetic superlattice".Physica Status Solidi B-Basic Solid State Physics 244.12(2007):4678-4687. |
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来源：金属研究所
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