Current-controlled dynamic magnonic crystal

Abstract

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.

4 pages, 3 figures

References in corpus (8)

• Realization of XNOR and NAND spin-wave logic gates
• Scattering of backward spin waves in a one-dimensional magnonic crystal
• Scattering of surface and volume spin waves in a magnonic crystal
• Resonant scattering of spin waves from a region of inhomogeneous magnetic field in a ferromagnetic film
• Design and optimization of one-dimensional ferrite-film based magnonic crystals
• Formation of guided spin-wave bullets in ferrimagnetic film stripes
• Frequency-dependent reflection of spin waves from a magnetic inhomogeneity induced by a surface DC-current
• Generation of pulse trains by current-controlled magnetic mirrors

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