Dipole-Exchange Spin Waves in the System of One-Dimensional Periodic Chain of Elliptic Antidots
V. V. Danylchuk, V. V. Kulish
National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
Received: 26.11.2018; final version - 17.03.2019. Download: PDF
In the paper, spin waves are investigated in a thin film composed of a uniaxial ferromagnet in which a one-dimensional periodic system of elliptic antidots is present. The ferromagnet has an ‘easy axis’ type. For such a system, an equation for the magnetic potential is obtained in the magnetostatic approximation with account for the magnetic dipole-dipole interaction, the exchange interaction and the anisotropy effects. The solution of the above-mentioned equation and, respectively, the dispersion relation for the investigated spin waves are found. For the case of elongated antidots, so that their bigger semiaxes are much larger than smaller one, the transverse wavenumbers’ spectrum and the spectrum of frequencies’ values are found.
Key words: spin wave, thin magnetic film, antidot, dipole-exchange theory.
PACS: 62.23.St, 75.30.Ds, 75.50.Gg, 75.75.Jn, 75.90.+w
Citation: V. V. Danylchuk and V. V. Kulish, Dipole-Exchange Spin Waves in the System of One-Dimensional Periodic Chain of Elliptic Antidots, Metallofiz. Noveishie Tekhnol., 41, No. 7: 837—849 (2019) (in Ukrainian)