Propagation of magnetostatic modes on aperiodic rare-earth multilayers

• Published in: Solid state communications 2018-01, Vol.269, p.76-82
• Main Authors: Santiago, F.A.L., Anselmo, D.H.A.L., Almeida, N.S., Vasconcelos, M.S., Cottam, M.G., Mello, V.D.
• Format: Article
• Language: English
• Subjects: A. Rare-earth; B. Aperiodic superlattices; C. Magnetostatic modes; D. Scaling behavior
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2017.10.012

The localization behavior and scaling properties of magnetostatic modes propagating on magnetic aperiodic superlattices made up by rare-earth materials is analyzed. Both surface and bulk modes are obtained, considering two different aperiodic rules of stacking: Thue-Morse and Fibonacci. The magnetization is considered to be perpendicular to the superlattice's interfaces. Our model consider as magnetic materials both dysprosium and holmium, at different temperatures. A scaling behavior is observed for the allowed bulk bands, through specific ordering parameters, meaning that the allowed bands have a fractal (or multifractal) structure. •The surface and bulk magnetostatic modes propagating in aperiodic rare-earth superlattices are described in detail.•The complex magnetic structure of dysprosium and holmium, do not destroy the quasiperiodic magnetostatic profile.•The scaling properties indicate that the magnetostatic spectra have indeed a fractal behavior.