| Автор | N Papanicolaou |
| Автор | P N Spathis |
| Дата выпуска | 1999-03-01 |
| dc.description | We establish the existence of a finite-energy solitary wave in a two-dimensional planar ferromagnet which moves rigidly at any constant velocity v that is smaller than the magnon velocity c. The shape of the calculated soliton depends crucially on the relative magnitude of v and c. For v<<c, the soliton describes a widely separated vortex-antivortex pair undergoing Kelvin motion at a relative distance . There exists a crossover velocity v<sub>0</sub> at which the vortex-antivortex character is lost and the energy-momentum dispersion develops a cusp. For v<sub>0</sub><v<c, the soliton becomes a lump with no apparent topological features and solves the modified KP equation in the limit . We also describe briefly a similar calculation of a vortex ring in a three-dimensional planar ferromagnet. These results together with the analytically known one-dimensional kink provide an interesting set of semitopological solitons whose physical significance is yet to be explored. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Semitopological solitons in planar ferromagnets |
| Тип | paper |
| DOI | 10.1088/0951-7715/12/2/008 |
| Electronic ISSN | 1361-6544 |
| Print ISSN | 0951-7715 |
| Журнал | Nonlinearity |
| Том | 12 |
| Первая страница | 285 |
| Последняя страница | 302 |
| Аффилиация | N Papanicolaou; Department of Physics, University of Crete, Heraklion, Greece and Research Centre of Crete, Heraklion, Greece |
| Аффилиация | P N Spathis; Department of Physics, University of Crete, Heraklion, Greece and Research Centre of Crete, Heraklion, Greece |
| Выпуск | 2 |
