The effect of interparticle interactions on spin glass and hyperthermia properties of Fe3O4 nanoparticles

Water dispersible Fe3O4 nanoparticles (NPs) were prepared, forming a durable suspension for several days. The zero field cooled magnetization peak temperature is ~4.5 times larger than the average blocking temperature, suggesting the presence of interparticle interactions. Frequency dependent AC mag...

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Bibliographic Details
Published in:Materials research express 2017-07, Vol.4 (7)
Main Authors: Aslibeiki, B, Ehsani, M H, Nasirzadeh, F, Mohammadi, M A
Format: Article
Language:English
Subjects:
AC susceptibility
hyperthermia
interaction
spin glass
Online Access:Get full text
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Summary:Water dispersible Fe3O4 nanoparticles (NPs) were prepared, forming a durable suspension for several days. The zero field cooled magnetization peak temperature is ~4.5 times larger than the average blocking temperature, suggesting the presence of interparticle interactions. Frequency dependent AC magnetic susceptibility revealed superspin glass state at low temperatures. Also a signature of size dependent surface spin glass state was observed associated with a hump in in-phase and a peak in out-of phase susceptibility curves. Magnetic hyperthermia studies indicated that interparticle interactions influence the heat generation of NPs in an AC magnetic field. The temperature rise of 7 nm particles obtained was 8 times larger than that of 5 nm particles. This study shows the important role of interparticle interactions on magnetic and hyperthermia properties of magnetic NPs.
ISSN:2053-1591
DOI:10.1088/2053-1591/aa7eb1