Laser-damage-induced microdomain in LiNbO3:Fe

In this communication a clear observation of ferroelectric microdomains induced by laser damage is described. The microdomains are seen clearly through crossed nicols and arise at the positive Ps side of the mark of laser damage, not at the negative Ps side. Considering the existence of oriented dis...

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Bibliographic Details
Published in:Journal of applied physics 1989-06, Vol.65 (11), p.4458-4460
Main Authors: Wu, Zhongkang, Wang, Jinxiong, Wang, Huafu, Lu, Yongbin, Deng, Yang, Xu, Yuheng
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Physical radiation effects, radiation damage
Physics
Structure of solids and liquids
crystallography
Ultraviolet, visible, and infrared radiation effects (including laser radiation)
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Summary:In this communication a clear observation of ferroelectric microdomains induced by laser damage is described. The microdomains are seen clearly through crossed nicols and arise at the positive Ps side of the mark of laser damage, not at the negative Ps side. Considering the existence of oriented displacement of photostimulated carriers and local electric field in the exposed region due to the photovoltaic effect, the displacement of Li+ along the negative Ps direction is shown by an α-track technique. Therefore, the microdomain is considered originating from oriented displacements of Li+ ions along the direction of Ps. The ion moves through the triangular plane of oxygen under photovoltaic stimulation and induces the ordering of Li, Nb, and vacancy under the local electric field.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.343264