STUDY OF PERIODICALLY POLED CZOCHRALSKI-GROWN ND-MG-LINBO3 BY CHEMICAL ETCHING AND X-RAY-MICROANALYSIS

Nd:Mg:LiNbO3 bulk single crystals with periodically poled ferroelectri c domain structure were grown by Czochralski technique along [2 (1 1) over bar 0] (X-axis) and along the normal to the face (0 1 (1) over ba r 2). The domain structure with period 4-30 mu m was studied by select ive chemical etching and metallographic microscope. The distribution o f the impurities along the growth directions was measured by wave disp ersive X-ray (WDX) microanalysis. The domain structure of crystals and the distribution of impurities are strongly dependent on the seed ori entation.