Critical radii of ferroelectric domains for different decay processes in LiNbO3 crystals
Critical radii of ferroelectric domains for different decay processes in LiNbO3 crystals
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DOI：
10.1063/1.2790475
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发表时间：
2007-09
影响因子：
4
通讯作者：
Y. Kan;Xiaomei Lu;Huifeng Bo;F. Huang;Xiaobo Wu;Jinsong Zhu
中科院分区：
文献类型：
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作者：
Y. Kan;Xiaomei Lu;Huifeng Bo;F. Huang;Xiaobo Wu;Jinsong Zhu
采用扫描探针显微镜对LiNbO_3晶体进行了定点极化和表征。研究了制备畴的生长演化和衰减过程。提出了两个决定畴衰减行为的临界半径rC和Rc，其中rC被认为对应于畴刚穿透晶体的点。半径大于rC的畴可以存在5d以上，介于rC和Rc之间的畴在完全消失前经历了一个明显的亚稳态，而半径小于Rc的畴在压电响应力模式下甚至不可见。
The LiNbO3 crystals were polarized at fixed points and characterized by means of scanning probe microscope. The growth evolution and the decay process of the fabricated domains were carefully studied. Two critical radii rC and Rc that determine a different decay behavior of domains were put forward, where rC is considered to correspond to the point when the domains just penetrate the crystal. Those domains with radius larger than rC could exist beyond 5days, those between rC and Rc experienced a distinct metastable state before completely disappearing, while those smaller than Rc were even invisible under piezoresponse force mode.