Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 43: Magnetization Dynamics III

MA 43.3: Vortrag

Donnerstag, 3. April 2014, 15:30–15:45, HSZ 401

Nonlinear spin-wave scattering in a micro-structured magnonic crystal — Björn Obry¹, •Thomas Meyer¹, Philipp Pirro¹, Thomas Brächer^1,2, Julia Osten³, Andrii V. Chumak¹, Alexander A. Serga¹, Jürgen Fassbender³, and Burkard Hillebrands¹ — ¹FB 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.