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Tuning the dynamics in Fe3O4 nanoparticles for hyperthermia optimization

Chen, Hao, Billington, David, Riordan, Edward, Blomgren, Jakob, Giblin, Sean R., Johansson, Christer and Majetich, Sara A. 2020. Tuning the dynamics in Fe3O4 nanoparticles for hyperthermia optimization. Applied Physics Letters 117 (7) , 073702. 10.1063/5.0017903
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The AC magnetic susceptibility (ACS) of Fe3O4 nanoparticles was measured between 10 kHz and 4 MHz at different temperatures and in applied DC fields. In this frequency range, magnetostatic interactions impact magnetization dynamics even for dilute assemblies. The ACS spectrum of relaxation frequencies changes both with temperature and the addition of a small DC field. Because both the relaxation peak frequency and amplitude can be tuned with the DC field, these results could be applied to magnetic hyperthermia applications to optimize heat delivery.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: AIP Publishing
ISSN: 0003-6951
Date of First Compliant Deposit: 23 August 2020
Date of Acceptance: 7 August 2020
Last Modified: 24 Aug 2020 10:00

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