  In contrast to the Pb-based magnetoelectric laminates (MELs), we find in the
BaTiO3 and NiFe2O4 laminates (number of layers n = 5-25) that the longitudinal
magnetoelectric (ME) voltage coefficient Alpha E33 becomes much larger than the
transverse one due to preferential alignment of magnetic moments along the
NiFe2O4 plane. Moreover, upon decreasing each layer thickness down to 15 um, we
realize enhanced Alpha E33 up to 18 mV/ (cm Oe) and systematic increase of the
ME sensitivity in proportion to n to achieve the largest in the Pb-free MELs
(400*10^-6V/Oe), thereby providing pathways for tailoring ME coupling in
mass-produced, environment friendly laminates.
