Moreno, Roberto, Poyser, Samuel, Meilak, Daniel et al. (6 more authors) (2020) The role of faceting and elongation on the magnetic anisotropy of magnetite Fe3O4 nanocrystals. Scientific Reports. 2722 (2020). ISSN 2045-2322
Abstract
Fe3O4 nanoparticles are one of the most promising candidates for biomedical applications such as magnetic hyperthermia and theranostics due to their bio-compatibility, structural stability and good magnetic properties. However, much is unknown about the nanoscale origins of the observed magnetic properties of particles due to the dominance of surface and finite size effects. Here we have developed an atomistic spin model of elongated magnetite nanocrystals to specifically address the role of faceting and elongation on the magnetic shape anisotropy. We find that for faceted particles simple analytical formulae overestimate the magnetic shape anisotropy and that the underlying cubic anisotropy makes a significant contribution to the energy barrier for moderately elongated particles. Our results enable a better estimation of the effective magnetic anisotropy of highly crystalline magnetite nanoparticles and is a step towards quantitative prediction of the heating effects of magnetic nanoparticles.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2020 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 03 Mar 2020 13:50 |
Last Modified: | 02 Dec 2024 01:12 |
Published Version: | https://doi.org/10.1038/s41598-020-58976-7 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41598-020-58976-7 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:157937 |