Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5489949 | Journal of Magnetism and Magnetic Materials | 2018 | 10 Pages |
Abstract
Nanostructured Co and permalloy films are fabricated on top of a polymethyl methacrylate (PMMA) colloidal crystals by magnetron sputtering. The influence of the geometry of the samples on the ferromagnetic resonance spectra is studied. A number of spin-wave resonances are found in the nanostructured system, while only a single resonance is observed in the spatially uniform flat film. The number of the observed resonance peaks increases with both the period of the colloidal crystal (120 ÷ 340 nm) and the film thickness (20 ÷ 90 nm). The micromagnetic simulations of the system show that the excited spin-wave modes are nonreciprocal because of nonzero toroidal momentum of the magnetization of the system.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M.V. Sapozhnikov, L.I. Budarin, E.S. Demidov,