Near-ideal magnetoelectricity in high-permeability magnetostrictive/piezofiber laminates with a (2-1) connectivity

Abstract

Theoretically, the two-phase laminated configurations should have even much higher magnetoelectric (ME) effects—however, prior experimental studies have failed to find such an enhancement. Here, the authors report the unleashing of the potential of the (2-1) connectivity configuration: a piezofiber (one-dimension connectivity) layer laminated between two high-permeability magnetostrictive FeBSiC alloy ones (two-dimension connectivity) has near-ideal ME coupling. Very high ME effects of up to $22\mathrm{V}∕\mathrm{cm}\mathrm{Oe}$ $(4\times {10}^{-7}\mathrm{s}∕\mathrm{m})$ at $1\mathrm{Hz}$ —an order of magnitude higher than the giant ones—have been found.