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Van Den Bos, Karel Hendrik Wouter
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Publications (3/3 displayed)
- 2022Element specific atom counting at the atomic scale by combining high angle annular dark field scanning transmission electron microscopy and energy dispersive X-ray spectroscopycitations
- 2017One step toward a new generation of C-MOS compatible oxide PN junctionscitations
- 2015Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEMcitations
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article
Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM
Abstract
Anti-phase boundaries (APBs) in an ordered CoPt alloy are planar defects which disturb the ordered structure in their vicinity and decrease the magnetic properties. However, it has not yet been clarified to what extend the APBs disturb the ordering. In this study, high-resolution HAADF-STEM images are statistically analysed based on the image intensities estimated by the statistical parameter estimation theory. In the procedure, averaging intensities, fitting the intensity profiles to specific functions, and assessment based on a statistical test are performed. As a result, the APBs in the stable CoPt are found to be characterised by two atomic planes, and a contrast transition range as well as the centre of an inclined APB is determined. These results show that the APBs are quite sharp and therefore may have no notable effect on the net magnetic properties due to their small volume fraction. (C) 2015 Elsevier B.V. All rights reserved.