Title
Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Journal of alloys and compounds. - Amsterdam
Volume/pages
644(2015) , p. 570-574
ISSN
0925-8388
ISI
000357143900083
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
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https://repository.uantwerpen.be/docman/iruaauth/026090/101127008.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/c5ffbb/10804.pdf
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