A hexadomain vortex in tetragonal ferroelectrics
A hexadomain vortex in tetragonal ferroelectrics
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DOI：
10.1063/1.3183577
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发表时间：
2009-07-13
影响因子：
4
通讯作者：
Huber, J. E.
中科院分区：
文献类型：
--
作者：
Muench, I.;Huber, J. E.
我们用相场模型研究了四方铁电晶体的内部磁通闭包，并证明了六畴稳定极化涡的存在。这种六畴涡旋具有三重旋转轴，并在独立的立方体纳米点的宽高比范围内表现为最小能量平衡状态。在宽宽比范围内，四个区域的方形极化涡代表较低的能量解。由于六畴涡旋具有八种稳定状态，因此在内存存储应用中具有重要的潜力。
We study internal flux closures in tetragonal ferroelectric crystals using a phase-field model and demonstrate the existence of a stable polarization vortex of six domains. This hexadomain vortex exhibits a threefold rotation axis and appears as a minimum energy equilibrium state over a narrow range of aspect ratios in freestanding cuboidal nanodots. Square polarization vortices of four domains represent lower energy solutions for a wide range of aspect ratios. The hexadomain vortex offers significant potential in memory storage applications as it has eight stable states.