Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Poster II
MA 55.36: Poster
Freitag, 4. April 2014, 10:30–13:30, P2
Ion Beam Induced Periodic Surface Defects: The Transition from a Thin Film to a Magnonic Crystal — •Manuel Langer1,2, Rodolfo A. Gallardo3, Anja Banholzer1,2, Andreas Jansen1,2, Tobias Schneider1,2, Kai Wagner4, Vladislaw Demidov5, Sergej O. Demokritov5, Pedro Landeros3, Kilian Lenz1, Jürgen Lindner1, and Jürgen Fassbender1,2 — 1HZDR, 01328 Dresden — 2TU Dresden, 01069 Dresden — 3UTFSM Valparaíso, Chile — 4University Duisburg-Essen, 47057 Duisburg — 5University Münster, 48149 Münster
Periodic arrays of magnetic stripe defects are fabricated by Cr+ ion implantation on a 30 nm permalloy film. Modifying the mean ion penetration depth, the defect height can be controlled, which allows an investigation of the gradual transition from a magnetic thin film towards a magnonic crystal.
Spin wave dispersion and two-magnon scattering are studied using brillouin light scattering (BLS) as well as broadband ferromagnetic resonance (FMR). The obtained results are corroborated by theoretical calculations based on a perturbation theory.