Using EBSD and TEM-Kikuchi patterns to study local crystallography at the domain boundaries of lead zirconate titanate |
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Authors: | M. U. FAROOQ,R. VILLAURRUTIA,I. MACLAREN,H. KUNGL&dagger ,M. J. HOFFMANN&dagger ,J.-J. FUNDENBERGER&Dagger ,& E. BOUZY&Dagger |
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Affiliation: | Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom;IKM, Universität Karlsruhe, Haid-und-Neu-Str. 7, 76131 Karlsruhe, Germany;LETAM, UMR CNRS 7078, ISGMP Bât. B, Ile du Saulcy, F57045 METZ cedex 1, France |
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Abstract: | Reliable EBSD mapping of 90° 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° 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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Keywords: | Domain wall electron backscatter diffraction ferroelectric kikuchi pattern lead zirconate titanate misorientation |
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