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This article is cited in 6 scientific papers (total in 6 papers)
Ferroelectricity
Potential images of ferroelectric domain structures formed by electron beam in lithium niobate crystals
L. S. Kokhanchik Institute of Microelectronics Technology and High-Purity Materials RAS, Chernogolovka, Moscow oblast, Russia
Abstract:
Ferroelectric domain structures formed by an electron beam in lithium niobate crystals are studied using low-voltage SEM microscopy. The structures are formed in crystals with different conductivity, including samples with high-resistance congruent composition (CLN) and samples with conductivity increased by reductive annealing (RLN). The potential nature of the contrast of the domain structures observed in the secondary electron mode depending on the conductivity of the samples and the direction of spontaneous polarization of the domains is analyzed. It is assumed that the domain contrast in CLN crystals is associated with long-lived charges localized near domain walls and in the irradiated areas. The recorded domain structures in the CLN crystals are visualized on polar and nonpolar cuts. In the RLN crystals with improved conductivity compared to CLN, the potential contrast of the periodic domain structures is found only on the polar cuts, where vector $P_ s$ of the domains is perpendicular to the irradiated surface. This contrast is likely because the field of the spontaneous electric polarization charges influences the secondary electrons.
Received: 21.02.2018
Citation:
L. S. Kokhanchik, “Potential images of ferroelectric domain structures formed by electron beam in lithium niobate crystals”, Fizika Tverdogo Tela, 60:9 (2018), 1733–1740; Phys. Solid State, 60:9 (2018), 1778–1785
Linking options:
https://www.mathnet.ru/eng/ftt9077 https://www.mathnet.ru/eng/ftt/v60/i9/p1733
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