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MA: Fachverband Magnetismus

MA 2: Spin-Dynamics / Spin-Torque I

MA 2.2: Talk

Monday, March 23, 2009, 11:15–11:30, HSZ 04

One-dimensional YIG film based magnonic crystals — •Andrii V. Chumak, Alexander A. Serga, and Burkard Hillebrands — FB Physik and Forschungszentrum OPTIMAS, TU Kaiserslautern, Germany

Scattering of backward volume magnetostatic spin waves (BVMSW) from a one-dimensional magnonic crystal was experimentally studied. The crystal was produced by etching of a periodic groove array on a surface of a single crystal yttrium-iron-garnet ferrite film. We demonstrate that in the BVMSW configuration the one-dimensional magnonic crystal shows excellent spin-wave signal rejection of more than 30 dB. It was found that the optimal groove depth (ensuring that the loss in the transmission band inserted by the array is smaller than 5 dB) is approximately 10% of the film thickness. The rejection efficiency and the frequency width of the rejection bands increase with increasing groove depth.

A theoretical model based on the analogy of a spin-wave film waveguide with a microwave transmission line was used to interpret the obtained experimental results.

Financial support by the DFG within SE 1771/1-1 is acknowledged.