Clarke, Daniel, Marquina, C, Lloyd, David et al. (1 more author) (2022) Effect of the distribution of anisotropy constants on the magnetic properties of iron oxide nanoparticles. Journal of Magnetism and Magnetic Materials. 169543. ISSN 0304-8853
Abstract
The distribution of shape anisotropy constants in two colloids of iron oxide nanoparticles has been measured from the distribution of particle elongations within each system. The results are in good agreement with the values calculated from a temperature decay of remanence measurement. For a fluid with a saturation magnetisation of 420 emu/cc and an average particle elongation of ~1.3, the distribution of energy barriers is controlled by both the distribution of particle sizes and particle elongations. For a fluid with a saturation magnetisation of 320 emu/cc and a wide distribution of particle sizes, the energy barrier to reversal can be assumed to be controlled by the distribution of particle volumes. These results highlight the need to take into account the distribution of anisotropy constants when making predictions of the heating properties of assemblies of magnetic nanoparticles for hyperthermia applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) The University of York > Faculty of Sciences (York) > Electronic Engineering (York) |
Depositing User: | Pure (York) |
Date Deposited: | 09 Jun 2022 09:20 |
Last Modified: | 01 Nov 2024 01:24 |
Published Version: | https://doi.org/10.1016/j.jmmm.2022.169543 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.jmmm.2022.169543 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:187809 |
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Description: Effect of the distribution of anisotropy constants on the magnetic properties of iron oxide nanoparticles
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