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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 Langer^1,2, Rodolfo A. Gallardo³, Anja Banholzer^1,2, Andreas Jansen^1,2, Tobias Schneider^1,2, Kai Wagner⁴, Vladislaw Demidov⁵, Sergej O. Demokritov⁵, Pedro Landeros³, Kilian Lenz¹, Jürgen Lindner¹, and Jürgen Fassbender^1,2 — 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.