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Interaction effects enhancing magnetic particle detection based on magneto-relaxometry

Interaction effects enhancing magnetic particle detection based on magneto-relaxometry
Interaction effects enhancing magnetic particle detection based on magneto-relaxometry
We investigated the effects of dipolar interactions on the long-time magnetization decay M(t) in clusters of magnetic nanoparticles. Applying the Néel-Arrhenius thermal activation picture shows that M(t) generally follows stretched exponential behavior, dependent not only on the dipolar interaction strength, geometry of particle arrangement within clusters, but also on the field history applied during the initialization. As demonstrated, combining these factors could serve to enhance the degree of resolution in magnetic particle detection based on magneto-relaxometry.
nanoparticles, nanoparticles - relaxometry
0003-6951
Laslett, O.
26a9ecdf-102d-41f1-8997-0a037fa087f0
Ruta, S.
2b4868a0-a3ed-42cd-8f55-cfcd3ae3095b
Barker, J.
78f47f76-9d49-45b2-9788-6c667a435c26
Chantrell, R.W.
2df0bd37-172a-4d0b-892a-2c78b6dc3fc3
Friedman, G.
db2affbf-29bf-4a43-8e55-01b388d54c23
Hovorka, O.
a12bd550-ad45-4963-aa26-dd81dd1609ee
Laslett, O.
26a9ecdf-102d-41f1-8997-0a037fa087f0
Ruta, S.
2b4868a0-a3ed-42cd-8f55-cfcd3ae3095b
Barker, J.
78f47f76-9d49-45b2-9788-6c667a435c26
Chantrell, R.W.
2df0bd37-172a-4d0b-892a-2c78b6dc3fc3
Friedman, G.
db2affbf-29bf-4a43-8e55-01b388d54c23
Hovorka, O.
a12bd550-ad45-4963-aa26-dd81dd1609ee

Laslett, O., Ruta, S., Barker, J., Chantrell, R.W., Friedman, G. and Hovorka, O. (2015) Interaction effects enhancing magnetic particle detection based on magneto-relaxometry. Applied Physics Letters, 106 (1), [012407]. (doi:10.1063/1.4905339).

Record type: Article

Abstract

We investigated the effects of dipolar interactions on the long-time magnetization decay M(t) in clusters of magnetic nanoparticles. Applying the Néel-Arrhenius thermal activation picture shows that M(t) generally follows stretched exponential behavior, dependent not only on the dipolar interaction strength, geometry of particle arrangement within clusters, but also on the field history applied during the initialization. As demonstrated, combining these factors could serve to enhance the degree of resolution in magnetic particle detection based on magneto-relaxometry.

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More information

Accepted/In Press date: 18 December 2014
e-pub ahead of print date: 7 January 2015
Published date: 7 January 2015
Keywords: nanoparticles, nanoparticles - relaxometry
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 381837
URI: http://eprints.soton.ac.uk/id/eprint/381837
ISSN: 0003-6951
PURE UUID: f653a018-9306-4526-8cf9-41ade63361af
ORCID for O. Hovorka: ORCID iD orcid.org/0000-0002-6707-4325

Catalogue record

Date deposited: 30 Sep 2015 16:13
Last modified: 27 Feb 2021 02:44

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Contributors

Author: O. Laslett
Author: S. Ruta
Author: J. Barker
Author: R.W. Chantrell
Author: G. Friedman
Author: O. Hovorka ORCID iD

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