Stoichiometry and orientation- and shape-mediated switching field enhancement of the heating properties of Fe3 O4 circular nanodiscs
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F21%3A73610914" target="_blank" >RIV/61989592:15640/21:73610914 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.15.014056" target="_blank" >https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.15.014056</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevApplied.15.014056" target="_blank" >10.1103/PhysRevApplied.15.014056</a>
Alternative languages
Result language
angličtina
Original language name
Stoichiometry and orientation- and shape-mediated switching field enhancement of the heating properties of Fe3 O4 circular nanodiscs
Original language description
The generation of topological magnetic vortex-domain structures in iron-oxide nanomaterials has promising applications in biomedical scenarios, such as heat generators for hyperthermia treatments. In this report we describe alternative kinds of magnetic-vortex nanoparticles, circular Fe nanodiscs (NDs), and dissect their heating properties by in-depth investigation of their shape and size, stoichiometry, orientations, and switching field "H" behaviors, through experiments and theoretical simulation. We find that the stoichiometric NDs show better heating performance than nonstoichiometric materials because of the significant electron hopping between Feand Fe ion. The higher heating efficiency (in terms of specific absorption rate, SAR) is observed only for the higher switching field regime, an effect that is associated with the parallel and perpendicular alignment of nanodiscs with respect to low and high ac magnetic field, respectively. A higher SAR of approximately 270 W/g is observed at a higher switching field (approximately 700 Oe) for NDs of diameter 770 nm, which increases by a factor of 4 at a switching field of approximately 360 Oe for NDs of diameter 200 nm. The reported results suggest that the heating efficiency in these systems can be enhanced by controlling the switching field, which is, in turn, tuned by size, shape, and orientation of circular magnetic vortex nanodiscs.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21001 - Nano-materials (production and properties)
Result continuities
Project
<a href="/en/project/EF17_048%2F0007323" target="_blank" >EF17_048/0007323: Development of pre-applied research in nanotechnogy and biotechnology</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Applied
ISSN
2331-7019
e-ISSN
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Volume of the periodical
15
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
"nečíslováno"
UT code for WoS article
000612682800003
EID of the result in the Scopus database
2-s2.0-85100371831