High Magnetoelectric Properties in 0.68Pb(Mg 1/3 Nb 2/3 )O 3 -0.32PbTiO 3 Single Crystal and Terfenol-D Laminate Composites

Abstract

Magnetoelectric(ME) laminate composites of Pb(Mg 1/3 Nb 2/3)O 3-PbTiO 3 (PMN-PT) and Terfenol-D were prepared by sandwiching single crystals of PMN-PT between Terfenol-D disks. The magnetoelectric voltage coefficient (dE/dH) of the composite was determined to be 10.30 V/cm · Oe, at 1 kHz and under a dc magnetic bias of 0.4 T. The value of dE/dH is ~80 times higher than either that of naturally occurring magnetoelectrics or artificially-grown magnetoelectric composites. This superior magnetoelectric voltage coefficient is attributed to the high piezoelectric voltage constant as well as the high elastic compliance of PMN-PT single crystal and the large magnetostrictive response of Terfenol-D.