Photorefractive effect of ion-doped Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>-PbTiO<sub>3</sub> single crystals
Abstract
By a flux solution method,Fe:0.01wt%and Fe:0.1wt%doped 0.67Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>-0.33PbTiO<sub>3</sub>(PMN-PT)single crystals were grown.Using two-beam coupling experiment,the photorefractive property of the Fe-doped PMN-PT relaxor ferroelectric single crystals was studied.The extinction spectrum,the electro-optical coefficient,the light- induced absorption change,and the photoconductivity were measured.The maximum gain coefficient reached 21 cm<sup>-1</sup>,which was about twice as large as that of undoped PMN-PT.With increasing Fe content,the grating formation rate decreased.
