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Dresden 2014 – scientific programme

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MA: Fachverband Magnetismus

MA 43: Magnetization Dynamics III

MA 43.3: Talk

Thursday, April 3, 2014, 15:30–15:45, HSZ 401

Nonlinear spin-wave scattering in a micro-structured magnonic crystalBjörn Obry1, •Thomas Meyer1, Philipp Pirro1, Thomas Brächer1,2, Julia Osten3, Andrii V. Chumak1, Alexander A. Serga1, Jürgen Fassbender3, and Burkard Hillebrands11FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, 67663 Kaiserslautern, Germany — 3Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany, and TU Dresden, 01062 Dresden, Germany

We study the nonlinear multi-magnon processes in a micro-structured magnonic crystal consisting of a Ni81Fe19 waveguide, which has been periodically modulated in its saturation magnetization by localized ion implantation. A significant modification of the nonlinear magnon spectrum compared to a reference waveguide is determined, exhibiting a predominant scattering into modes with a frequency at the magnonic band gaps and an enhancement of the nonlinearities for some excitation frequencies. The results prove the feasibility to utilize nonlinear multi-magnon scattering for magnon spintronic applications on the micrometer scale.

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