Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice
文献类型：期刊论文
| 作者 | R. K. Qiu ; Z. D. Zhang ; L. Q. Guo ; C. H. Ying ; A. Liang |
| 刊名 | Physica Status Solidi B-Basic Solid State Physics
 |
| 出版日期 | 2006 |
| 卷号 | 243期号:8页码:1983-1995 |
| 关键词 | periodic elastic composites acoustic band-structure spin-waves ferromagnetic superlattices voigt configuration internal energy exchange magnetization multilayers systems |
| ISSN号 | 0370-1972 |
| 中文摘要 | The magnon energy band in a ferrimagnetic superlattice with three layers in a unit cell is studied by employing retarded Green's functions and the spin-wave method. Two modulated energy gaps Delta omega(13) and Delta omega(23) are evaluated systematically, which exist in the magnon energy band along the K-x-direction perpendicular to the plane of the superlattice. It is revealed that the energy gap Delta omega(13) has a direct relation with the symmetry among the spin quantum numbers and the interlayer exchange couplings, while the energy gap Delta omega(23) relates to the symmetry among these spin quantum numbers only. These symmetries differ from the symmetry of crystallographic point groups. We define the magnetically structural symmetry that is dominated mainly by the magnetic parameters. The absence of the energy gap at a certain condition means that the system has a high magnetically structural Symmetry. The magnetically structural symmetry perlattice, which is an intrinsic property, strongly affects the magnon energy band structure and thus the magnetic behaviors of the system. Furthermore, two complete bandgaps are observed to extend through the Brillouin zone (referred to as "magnonic crystal") in this superlattice system. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34429]  |
| 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. Q. Guo,et al. Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice[J]. Physica Status Solidi B-Basic Solid State Physics,2006,243(8):1983-1995. |
| APA | R. K. Qiu,Z. D. Zhang,L. Q. Guo,C. H. Ying,&A. Liang.(2006).Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice.Physica Status Solidi B-Basic Solid State Physics,243(8),1983-1995. |
| MLA | R. K. Qiu,et al."Magnon energy gap and the magnetically structural symmetry in a three-layer ferrimagnetic superlattice".Physica Status Solidi B-Basic Solid State Physics 243.8(2006):1983-1995. |
入库方式： OAI收割
来源：金属研究所
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