Ferroelectric domain structures in LiNbO3 single-crystal fibers

作者：Y.S. Luh, R. S. Feigelson, M. M. Fejer, Robert L. Byer · 发表于：Journal of Crystal Growth · 年份：1986 · DOI：10.1016/0022-0248(86)90510-5 · 被引用次数：104 · 研究领域：Photorefractive and Nonlinear Optics、Ferroelectric and Piezoelectric Materials、Acoustic Wave Resonator Technologies

The ferroelectric domain structures of small diameter LiNbO3 single crystal fibers were found to be different from those usually observed in large LiNbO3 crystals. c-Axis grown fibers with diameters up to 800 μm were found to be virtually single domain with +c end facing the melt during growth. Fibers grown along the a-axis had a bi-domain configuration with the domain boundary along the a-axis and parallel to the c-face. A model is proposed, based on the thermoelectric potential generated by axial and radial temperature gradients, to explain the domain structures observed in these fibers.