Control and imaging of ferroelectric domains over large areas with nanometer resolution in atomically smooth epitaxial Pb(Zr0.2Ti0.8)O3 thin films
Control and imaging of ferroelectric domains over large areas with nanometer resolution in atomically smooth epitaxial Pb(Zr0.2Ti0.8)O3 thin films
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DOI：
10.1063/1.120591
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发表时间：
1998-06
影响因子：
4
通讯作者：
T. Tybell;C. Ahn;J. Triscone
中科院分区：
文献类型：
--
作者：
T. Tybell;C. Ahn;J. Triscone
我们利用原子力显微镜的金属尖端作为可移动的顶电极和铁电性质的局域探针，研究了外延铁电氧化物薄膜在亚微米分辨率下对大面积铁电极化电场进行局域控制和成像的可能性。原子光滑的Pb0.2Ti0.8O3膜，其均方根粗糙度一般为几埃，可以均匀极化并在2500μm2的面积上成像，而不会引起任何地形混乱。在均匀偏振区的任意区域写入100 nm宽线和直径小于100 nm的圆形磁区的规则阵列。
We have investigated the possibility afforded by epitaxial ferroelectric oxide thin films to control and image locally the polarization field of ferroelectrics over large areas with submicron resolution, using the metallic tip of an atomic force microscope as a mobile top electrode and local probe of the ferroelectric properties. Atomically smooth films of Pb(Zr0.2Ti0.8)O3, showing a root-mean-square roughness of typically a few angstroms, could be uniformly polarized and imaged over areas as large as 2500 μm2 without introducing any topographic disorder. Regular arrays of 100 nm wide lines and circular domains with a diameter less than 100 nm were written in arbitrary areas of the uniformly polarized regions.