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Tuning the dynamics in Fe3O4nanoparticles for hyperthermia optimization
Carnegie Mellon University, USA.
Cardiff University, UK.
Cardiff University, UK.
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.ORCID iD: 0000-0002-6148-3574
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2020 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 117, no 7, article id 073702Article in journal (Refereed) Published
Abstract [en]

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. 

Place, publisher, year, edition, pages
American Institute of Physics Inc. , 2020. Vol. 117, no 7, article id 073702
Keywords [en]
Iron oxides, Magnetic susceptibility, Magnetite, Magnetostatics, AC Magnetic susceptibility, Fe3O4 nanoparticles, Frequency ranges, Magnetic hyperthermia, Magnetization dynamics, Magnetostatic interactions, Relaxation frequency, Relaxation peak, Nanomagnetics
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-48774DOI: 10.1063/5.0017903Scopus ID: 2-s2.0-85090353628OAI: oai:DiVA.org:ri-48774DiVA, id: diva2:1466946
Note

Funding details: Engineering and Physical Sciences Research Council, EPSRC, EP/S016465/1; Funding details: National Science Foundation, NSF, ECCS-1709845; Funding details: U.S. Department of Energy, USDOE, DE-SC0019237; Funding text 1: S.A.M. acknowledges support from U.S. NSF Grant No. ECCS-1709845 and DOE Grant No. DE-SC0019237. S.R.G. acknowledges support from EPSRC Grant No. EP/S016465/1.

Available from: 2020-09-14 Created: 2020-09-14 Last updated: 2023-05-22Bibliographically approved

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Blomgren, JakobJohansson, Christer

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