title: Switching 70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3single crystal by 3 MHz bipolar field.
abstract: Polarization switching and associated electromechanical property changes at 3.0 MHz were investigated with and without a direct current (dc) bias for [001]cpoled 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3single crystal. The results showed that the coercive field under a bipolar pulse at 3.0 MHz is 2.75 times as large as conventional definedEc(2.58 kV/cm at 0.1 Hz), and a dc bias can further enlarge the driving field. Our results point to an innovative transducer operating mechanism at high frequencies since one could drive the crystal under much larger fields at high frequencies to produce much stronger signals from a small array element for deeper penetration imaging.
authors.forename: Shiyang
authors.initials: S
authors.lastname: Li
authors.forename: Zhaojiang
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Department of Mathematics and Materials Research Institute, The Pennsylvania State University , University Park, Pennsylvania 16802, USA.
authors.forename: Wenwu
authors.identifier: 0000-0002-2447-1486
authors.initials: W
authors.lastname: Cao