TY - JOUR
T1 - Determination of the atomic width of an APB in ordered CoPt using quantified HAADF-STEM
AU - Akamine, H.
AU - Van Den Bos, K. H.W.
AU - Gauquelin, N.
AU - Farjami, S.
AU - Van Aert, S.
AU - Schryvers, D.
AU - Nishida, M.
N1 - Funding Information:
The authors acknowledge financial support from the N, G.0369.15 N and G.0374.13 N), a Ph.D. grant to Karel van den Bos. N.G. acknowledges support from the Research Foundation Flanders (FWO, Belgium) through project fundings (G.0368.15 European Research Council under an ERC starting Grant No. 278510 VORTEX and the Japan Society for the Promotion of Science (JSPS, Japan) through the Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation (R2408). The X-Ant-EM microscope was partly funded by the Hercules fund from the Flemish Government .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/5/26
Y1 - 2015/5/26
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jallcom.2015.04.205
DO - 10.1016/j.jallcom.2015.04.205
M3 - Letter
AN - SCOPUS:84930005793
SN - 0925-8388
VL - 644
SP - 570
EP - 574
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -