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Micromagnetic modelling and imaging of vortex/merons structures in an oxide | metal heterostructure

Abstract:
Using micromagnetic simulations, we have modelled the formation of imprinted merons and anti-merons in cobalt overlayers of different thickness (1-8 nm), stabilised by interfacial exchange with antiferromagnetic vortices in $\alpha$-Fe2O3. Structures similar to those observed experimentally could be obtained with reasonable exchange parameters, also in the presence of surface roughness. We produce simulated meron/antimeron images by magnetic force microscopy (MFM) and nitrogen-vacancy (N-V) centre microscopy, and established signatures of these topological structures in different experimental configurations.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevB.101.144420

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
ORCID:
0000-0002-6717-035X


Publisher:
American Physical Society
Journal:
Physical Review B More from this journal
Volume:
101
Issue:
14
Article number:
144420
Publication date:
2020-04-14
Acceptance date:
2020-02-26
DOI:
EISSN:
2469-9969
ISSN:
2469-9950


Language:
English
Keywords:
Pubs id:
1079590
Local pid:
pubs:1079590
Deposit date:
2020-02-27

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