SINGLE-CRYSTALS OF PB(MG1 3NB2/3)O-3-35 MOL-PERCENT PBTIO3 FROM POLYCRYSTALLINE PRECURSORS/

A potentially more cost-efficient method of growing single-crystal rel axer-based ferroelectric materials has been investigated, Seed single crystals of Pb(Mg1/3Nb2/3)O-3 (PMN)-35 mol% PbTiO3 (PT) were embedded within polycrystalline powders and annealed at temperatures from 900 d egrees to 1200 degrees C. The boundary of the single crystal migrated through the polycrystal matrix under the influence of grain boundary c urvature; growth distances of several millimeters were observed, verif ying the feasibility of the approach, The grown single crystals exhibi ted macroscopic cubic growth morphologies with (100) faces. Strain lev els as high as 0.68% under an electric field of 30 kV/cm were observed in initial measurements.