掺铁铌镁酸铅-钛酸铅单晶的光折变效应  

Photorefractive effect of ion-doped Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 single crystals

作　　者：贾红[1] 孙亮[2] 

机构地区：[1]绥化学院电子工程学院,绥化152061 [2]宜宾学院物理与电子工程学院,宜宾644000

出　　处：《中国科学：物理学、力学、天文学》2012年第4期333-338,共6页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金资助项目(批准号:60808026,50902027)

摘　　要：采用助溶剂法生长了掺杂量分别为0.1wt%和0.01wt%的0.67PMNT-0.33PT单晶.利用二波耦合实验研究了掺铁的弛豫铁电单晶0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3(PMN-PT)的光折变性能.本文测了样品的消光光谱、电光系数、光诱吸电场和光电.最大的增益系数达了21 cm 1,是无掺杂的PMN-PT晶体的两倍.光栅形成速率随铁浓度的升高而降低.By a flux solution method, Fe：0.01wt% and Fe：0.1wt% doped 0.67Pb（Mgx/3Nb2/3）O3-0.33PbTiO3 （PMN-PT） single crystals were grown. Using two-beam coupling experiment, the photorefractive property of the Fedoped PMNPT relaxor ferroelectric single crystals was studied. The extinction spectrum, the electrooptical coefficient, the light induced absorption change, and the photoconductivity were measured. The maximum gain coefficient reached 21 cm-1, which was about twice as large as that of undoped PMN-PT. With increasing Fe content, the grating formation rate decreased.

关 键 词：PMN-PT 光折变效应 二波耦合 光致变色 

分 类 号：O734.2[理学—晶体学]