Pinning effects of dislocations on vortex domain structure in ferroelectric nanodots
Pinning effects of dislocations on vortex domain structure in ferroelectric nanodots
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DOI：
10.1063/1.4881884
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发表时间：
2014-06
影响因子：
4
通讯作者：
Wenfang Chen;Yue Zheng;Biao Wang
中科院分区：
文献类型：
--
作者：
Wenfang Chen;Yue Zheng;Biao Wang
研究了界面位错和内部位错对铁电纳米点中涡旋畴结构形成的影响。由于位错核附近的高度不均匀的应变场，位错被发现在涡旋形核阶段起着重要的作用，并可以显着影响涡旋形成温度。更重要的是，涡核可以被位错钉扎，导致可能控制涡域图案（例如，涡旋数和取向）。这对铁电涡旋畴结构在位错系统中的实际应用具有指导意义。
Effects of interfacial and internal dislocations on formation of vortex domain structure in ferroelectric nanodots have been investigated. Due to the highly inhomogeneous strain field near the dislocation core, dislocations are found to play important roles in vortex nucleation stage and can significantly affect vortex formation temperature. More importantly, the vortex core may be pinned by the dislocations, leading to a possible control of vortex domain pattern (e.g., vortices number and orientation) in the nanodots. This study should be very instructive for practical applications of ferroelectric vortex domain structure in systems where dislocations exist.