Larissa Panina and Dmitriy Makhnovskiy Microwave permittivity and permeability of magnetic wire composites physica status solidi (a) 211
The authors provide a comprehensive review on electromagnetic properties of composites with magnetic microwires. The analysis is made in terms of the effective parameters: permittivity and permeability. The use of magnetic components in wire media makes it possible to realise controllable or tunable electromagnetic materials operating at GHz frequencies. The figure shows a resonant magnetic wire system the effective permittivity of which is controlled by applied tensile stress which rotates the magnetisation towards circular direction decreasing the high frequency impedance.
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