It has been shown that Erbium doping affects the domain structure of LiNbO3
crystals grown from congruent melt. Doping up to 5 mol% produces opposite
domains for congruent crystals. Additionally, the monodomain configuration
of pure stoichiometric crystal becomes polydomain with the addition of Er i
n the melt. (C) 1999 Elsevier Science Ltd. All rights reserved.