Strong dynamic magnetoelectric coupling in metamaterial

Magnetoelectric susceptibility (ξ) of classical magnetoelectrics is always substantially smaller that the geometric average of the electric (χ <Subscript> e </Subscript>) and magnetic (χ <Subscript> m </Subscript>) susceptibilities. Materials reaching the equality ξ <Superscript>2</Superscript>=χ <Subscript> e </Subscript> χ <Subscript> m </Subscript> as a limiting value may thus be considered as ideal magnetoelectrics. Here we investigate the magnetoelectric susceptibility of a metamaterial built from split ring resonators both experimentally and within an equivalent circuit model. Due to a direct proportionality between electric polarization and magnetization, the magnetoelectric susceptibility of this metamaterial fulfils the equality ξ <Superscript>2</Superscript>=χ <Subscript> e </Subscript> χ <Subscript> m </Subscript> at least in the dynamic regime. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011