A longitudinal-longitudinal mode TERFENOL-D∕Pb(Mg1∕3Nb2∕3)O3–PbTiO3 laminate composite

Abstract

We have found that laminates of longitudinally magnetized magnetostrictive TERFENOL-D layersand a longitudinally poled piezoelectric $\mathrm{Pb}\left({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}\right){\mathrm{O}}_3\text{-}{\mathrm{PbTiO}}_3$ crystal have a giant magnetoelectric voltage coefficient of $>430\mathrm{mV}∕\mathrm{Oe}$ under a low magnetic bias. Under a resonant drive operation at a frequency of 82.1 kHz, the magnetoelectric coefficient was dramatically increased to $\sim 18.5\mathrm{V}∕\mathrm{Oe}$ . In addition, an ultrahigh magnetic field sensitivity of $<{10}^{-11}\mathrm{T}$ has been observed.