Spin Waves in a Ferromagnetic Film with a Periodic System of Antidots
In the paper, spin waves in a thin film (composed of a uniaxial ferromagnet) with a two-dimensional periodical system of antidots are studied. The film ferromagnet is considered to have the “easy axis” type. To describe such waves, the magnetostatic approximation with account for the magnetic dipole...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
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Sumy State University
2015-03-01
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| Series: | Журнал нано- та електронної фізики |
| Subjects: | |
| Online Access: | http://jnep.sumdu.edu.ua/download/numbers/2015/1/articles/jnep_2015_V7_01020.pdf |
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| Summary: | In the paper, spin waves in a thin film (composed of a uniaxial ferromagnet) with a two-dimensional periodical system of antidots are studied. The film ferromagnet is considered to have the “easy axis” type. To describe such waves, the magnetostatic approximation with account for the magnetic dipole-dipole interaction, the exchange interaction and the anisotropy effects is used. For such waves, an equation for the magnetic potential is derived; for the case of remote antidots, the dispersion relation and the transverse wavenumber spectrum are found. For the case of a film thin compared to the exchange length and for the case of a film bounded by a high-conductivity metal, the longitudinal wavenumber spectrum and the frequency spectrum of such spin waves are also obtained. |
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| ISSN: | 2077-6772 |