Using EBSD and TEM-Kikuchi patterns to study local crystallography at the domain boundaries of lead zirconate titanate.
Reliable EBSD mapping of 90 degree 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 degree 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.
Farooq
M U
MU
Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
Villaurrutia
R
R
MacLaren
I
I
Kungl
H
H
Hoffmann
M J
MJ
Fundenberger
J-J
JJ
Bouzy
E
E
D003460:Crystallization; D003461:Crystallography / Q000379:methods*; D007854:Lead / Q000032:analysis / Q000737:chemistry*; D008854:Microscopy, Electron; D014025:Titanium / Q000032:analysis / Q000737:chemistry*; D014961:X-Ray Diffraction; D015040:Zirconium / Q000032:analysis / Q000737:chemistry*
C065536:lead titanate zirconate; D007854:Lead; D015040:Zirconium; D014025:Titanium