Inherent nanoscale bend of crystal lattice in Fe-doped calcium copper titanate
Inherent nanoscale bend of crystal lattice in Fe-doped calcium copper titanate
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DOI：
10.1063/1.2354470
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发表时间：
2006-09
影响因子：
4
通讯作者：
Sung‐Yoon Chung;Si-Young Choi;Takahisa Yamamoto;Y. Ikuhara
中科院分区：
文献类型：
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作者：
Sung‐Yoon Chung;Si-Young Choi;Takahisa Yamamoto;Y. Ikuhara
利用高分辨率电子显微镜和图像模拟，证明了fe掺杂的CaCu3Ti4O12的一些晶格在纳米尺度上是固有弯曲的。实验得到的图像与模拟图像的对比表明，弯曲角度为几毫弧度，这在脆性氧化物中是显著的。尽管存在这样的晶格畸变，畸变引起的大部分晶格应变似乎在存在许多错配位错的畴壁处释放。
Utilizing high-resolution electron microscopy and image simulation, it is demonstrated that some of the crystal lattices of Fe-doped CaCu3Ti4O12 are intrinsically bent at the nanometer scale. A comparison between experimentally obtained and simulated images indicates that the bending angle is of a few milliradians, which is remarkable in a brittle oxide. Despite such lattice distortion, much of the lattice strain induced by the distortion appears to be released at the domain walls where a number of misfit dislocations are present.