Effect of dipolar interactions and DC magnetic field on the specific absorption rate of an array of magnetic nanoparticles

Abstract : We address the issue of inter-particle dipolar interactions in the context of magnetic hyperthermia. More precisely, the main question dealt with here is concerned with the conditions under which the specific absorption rate is enhanced or reduced by dipolar interactions. For this purpose, we propose a theory for the calculation of the AC susceptibility, and thereby the specific absorption rate, for a monodisperse two-dimensional assembly of nanoparticles with oriented anisotropy, in the presence of a DC magnetic field, in addition to the AC magnetic field. We also study the competition between the dipolar interactions and the DC field, both in the transverse and longitudinal configurations. In both cases, we find that the specific absorption rate has a maximum at some critical DC field that depends on the inter-particle separation. In the longitudinal setup, this critical field falls well within the range of experiments.
Document type :
Journal articles
Complete list of metadatas

Cited literature [27 references]  Display  Hide  Download

https://hal-univ-perp.archives-ouvertes.fr/hal-01904605
Contributor : Dorian Miler <>
Submitted on : Friday, February 8, 2019 - 11:39:11 AM
Last modification on : Monday, April 29, 2019 - 3:42:01 PM
Long-term archiving on : Thursday, May 9, 2019 - 12:26:32 PM

File

1.4984013.pdf
Publisher files allowed on an open archive

Identifiers

Citation

J.-L. Déjardin, F. Vernay, Marc Respaud, H. Kachkachi. Effect of dipolar interactions and DC magnetic field on the specific absorption rate of an array of magnetic nanoparticles. Journal of Applied Physics, American Institute of Physics, 2017, 121 (20), ⟨10.1063/1.4984013⟩. ⟨hal-01904605⟩

Share

Metrics

Record views

44

Files downloads

16