期刊
JOURNAL OF MICROSCOPY
卷 230, 期 3, 页码 445-454出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2818.2008.02004.x
关键词
domain wall; electron backscatter diffraction; ferroelectric; kikuchi pattern; lead zirconate titanate; misorientation
类别
资金
- EPSRC [EP/D032768/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D032768/1] Funding Source: researchfish
Reliable EBSD mapping of 90 degrees domains in a tetragonal ferroelectric perovskite has been achieved for the first time, together with reliable automated orientation determination from TEM-Kikuchi patterns. This has been used to determine misorientation angles at 90 degrees domain boundaries and thus local c/a ratios. The sources of orientation noise/error and their effects on the misorientation angle data have been thoroughly analyzed and it is found that this gives a cosine distribution of misorientation angles about the mean with a characteristic width related to the width of the orientation noise distribution. In most cases, a good agreement is found between local c/a ratios and global measurements by X-ray diffraction, but some clear discrepancies have also been found suggesting that real local variations are present, perhaps as a consequence of compositional inhomogeneities.
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