| On magnon energy branches of multilayer ferrimagnetic superlattices | |
| R. K. Qiu; Z. D. Zhang | |
| 2007 | |
| Source Publication | Physica Status Solidi B-Basic Solid State Physics
 |
| ISSN | 0370-1972 |
| Volume | 244Issue:10Pages:3754-3758 |
| Abstract | The magnon energy branches of multilayer ferrimagnetic superlattices are discussed, as regards the linear spin-wave approach and Green's function technique. It is argued that negative energy branches in the spin-wave spectra of the ferrimagnetic systems have physical significance, which is responsible for the zero-point motion (i.e. the quantum fluctuations) in the ground state, since the sign of omega(1)(k) indicates the direction in which the spin-wave mode propagates. On boson Green's function treatment, the results calculated for physical properties with consideration of negative energy spectra are correct and the consequent conclusions do not need to be re-examined. Even for the definition of energy gaps, nothing is wrong from the theoretical point of view if one considers both negative and positive energy spectra, but one may need to consider two different definitions (one considers the negative/positive energy spectra; the other only the positive ones), from the experimental point of view, to compare both of them with experimental data, in an attempt to detect whether the negative energy branch does excite or not. 0 2007 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim. |
| description.department | chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. shenyang univ technol, shenyang 110023, peoples r china.;qiu, rk (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china;rkqiu@163.com |
| Keyword | Surface Spin-waves Magnetically Structural Symmetry 2-sublattice Ferrimagnets Heisenberg Ferrimagnet 3-layer Superlattices Internal Energy Systems Magnetization 3-sublattice Ferromagnet |
| URL | 查看原文 |
| WOS ID | WOS:000250256000031 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/33789 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | R. K. Qiu,Z. D. Zhang. On magnon energy branches of multilayer ferrimagnetic superlattices[J]. Physica Status Solidi B-Basic Solid State Physics,2007,244(10):3754-3758. |
| APA | R. K. Qiu,&Z. D. Zhang.(2007).On magnon energy branches of multilayer ferrimagnetic superlattices.Physica Status Solidi B-Basic Solid State Physics,244(10),3754-3758. |
| MLA | R. K. Qiu,et al."On magnon energy branches of multilayer ferrimagnetic superlattices".Physica Status Solidi B-Basic Solid State Physics 244.10(2007):3754-3758. |
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