Current-controlled dynamic magnonic crystal

Details Current-controlled dynamic magnonic crystal Current-controlled dynamic magnonic crystal

2009-04-02

arxiv.org/abs/0904.0332v1

J. Phys. D: Appl. Phys. 42 205005 (2009)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1088/0022-3727/42/20/205005

We demonstrate a current-controlled, dynamic magnonic crystal. It consists of a ferrite film whose internal magnetic field exhibits a periodic, cosine-like variation. The field modulation is created by a direct current flowing through an array of parallel wires placed on top of a spin-wave waveguide. A single, pronounced rejection band in the spin-wave transmission characteristics is formed due to spin-wave scattering from the inhomogeneous magnetic field. With increasing current the rejection band depth and its width increase strongly. The magnonic crystal allows a fast control of its operational characteristics via the applied direct current. Simulations confirm the experimental results.

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