Crystal Research and Technology
Cryst. Res. Technol. 34 (1999) 627 - Abstract -

I. Pracka, A. L. Bajor, S. M. Kaczmarek*, M. Swirkowicz, B. Kaczmarek, J. Kisielewski, T. Lukasiewicz

Institute of Electronic Materials Technology, Warsaw, Poland
*Military University of Technology, Warsaw, Poland

Growth and Characterization of LiNbO3 Single Crystals Doped with Cu and Fe Ions

Single crystals of lithium niobate doped with 0.03 and 0.1 at.% of Cu or Fe ions were grown by the Czochralski technique. Optical absorption spectra in visible and infrared regions before and after gamma irradiation with doses up to 105 Gy were measured and positions of both dopants in LiNbO3 lattice were analyzed according to changes in optical absorption in the range of OH- group absorption. Some properties of crystals doped with Cu during the growth processes were compared to those for specimens doped by thermodiffusion. It was observed that doping with Cu results in an increase of crystal resistance to radiation.

Keywords: LiNbO3; Optical properties; photorefractivity; doping


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