Effects of electron irradiation on the ferroelectric 180° in-plane nanostripe domain structure in a thin film prepared from a bulk single crystal of BaTiO3 by focused ion beam
Effects of electron irradiation on the ferroelectric 180° in-plane nanostripe domain structure in a thin film prepared from a bulk single crystal of BaTiO3 by focused ion beam
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DOI：
10.1063/1.3487481
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发表时间：
2011-01
影响因子：
3.2
通讯作者：
Takao Matsumoto;M. Okamoto
中科院分区：
文献类型：
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作者：
Takao Matsumoto;M. Okamoto
研究了电子辐照对BaTiO_3块体单晶聚焦离子束制备的铁电薄膜中180°面内纳米条形磁畴结构的影响。在强电子辐照下，磁畴结构转变为典型的90°面内纳米条形磁畴结构。特别是，观察到了一种非常规的90°面内三角形纳米条形磁畴结构。极化分析表明，在三角形磁区结构的边界处存在一个不完全或半个四磁区涡旋。结合使用含时Ginzburg-Landau方程的相场模拟，我们认为这种磁畴结构是由各向异性的面内电场产生的，而面内电场似乎是由入射电子束与铁电材料的各向异性相互作用引起的。
Effects of electron irradiation on the ferroelectric 180° in-plane nanostripe domain structure in a thin film prepared from a bulk single crystal of BaTiO3 by focused ion beam were studied. The domain structure transformed into a characteristic 90° in-plane nanostripe domain structure under intense electron irradiation. In particular, an unconventional triangular 90° in-plane nanostripe domain structure was observed. Polarization analysis suggests the existence of an incomplete or half tetradomain vortex at the boundary of the triangular domain structure. Together with the help of phase-field simulations using time-dependent Ginzburg–Landau equations, it is suggested that such a domain structure is created by an anisotropic in-plane electric field, which is plausibly induced by an anisotropic interaction of the incident electron beam with the ferroelectric material.