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
Laslett, O.
26a9ecdf-102d-41f1-8997-0a037fa087f0
Ruta, S.
2b4868a0-a3ed-42cd-8f55-cfcd3ae3095b
Barker, J.
78f47f76-9d49-45b2-9788-6c667a435c26
Chantrell, R.W.
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Friedman, G.
db2affbf-29bf-4a43-8e55-01b388d54c23
Hovorka, O.
a12bd550-ad45-4963-aa26-dd81dd1609ee
7 January 2015
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).
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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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
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Date deposited: 30 Sep 2015 16:13
Last modified: 15 Mar 2024 03:48
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Contributors
Author:
O. Laslett
Author:
S. Ruta
Author:
J. Barker
Author:
R.W. Chantrell
Author:
G. Friedman
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