Effect of annealing on the magnetic states of FEBID-grown cobalt nanopatterns examined by off-axis electron holography

Almeida, T. P. , McGrouther, D. , Kovács, A., Dunin-Borkowski, R. E. and McVitie, S. (2020) Effect of annealing on the magnetic states of FEBID-grown cobalt nanopatterns examined by off-axis electron holography. Journal of Microscopy, 279(3), pp. 217-221. (doi: 10.1111/jmi.12869) (PMID:31985824)

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The growth of cobalt nanopatterns (NPs) using focused electron‐beam induced deposition (FEBID) for localised magnetic studies is presented. The initial FEBID products are shown to be polycrystalline and form hetero‐structured core‐shell NPs through surface oxidation. Off‐axis electron holography is performed to reconstruct their morphology, thickness profile and image their individual magnetic vortex domain states. In situ annealing to 400°C promoted migration of the Co‐overspray to grow the Co NPs and improved their crystallinity through coarsening, as well as induced diffusion of embedded carbon out of their surface. It is found that the change in their morphology and chemical instability under heating restricts their suitability for examining thermally induced magnetic variations.

Item Type:Articles
Additional Information:The authors thank the University of Glasgow (200540-01) and Carnegie Trust (RIG007390) for funding.
Glasgow Author(s) Enlighten ID:McGrouther, Dr Damien and McVitie, Professor Stephen and Almeida, Dr Trevor
Authors: Almeida, T. P., McGrouther, D., Kovács, A., Dunin-Borkowski, R. E., and McVitie, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Microscopy
ISSN (Online):1365-2818
Published Online:27 January 2020
Copyright Holders:Copyright © 2020 Royal Microscopical Society
First Published:First published in Journal of Microscopy 279(3): 217-221
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302149Visualised Exchange Coupling in Core-Shell NanostructuresTrevor AlmeidaThe Carnegie Trust for the Universities of Scotland (CARNEGTR)RIG007390P&S - Physics & Astronomy