Abstract
Microfabrication of tunable negative refraction materials used in many experimental studies currently relies on the change of the component or the geometrical structure. We theoretically demonstrate magnetically controlled negative permeability in the composite composed of magnetic nanowires (Ni). A magnetic-field-dependent permeability was clearly observed by changing the applied magnetic field, which directly proves the tunable feature of the composite with a small external magnetic field. The simulation results suggest that magnetic nanowires composite can be an alternative route to realizing tunable negative refraction.
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