English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/216452
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Modelling the effect of different core sizes and magnetic interactions inside magnetic nanoparticles on hyperthermia performance

AuthorsJonasson, Christian; Schaller, Vincent; Zeng, Lunjie; Olsson, Eva; Frandsen, Cathrine; Castro, Alejandra; Nilsson, Lars; Bogart, Lara K.; Southern, Paul; Pankhurst, Quentin A.; Morales, M. P. ; Johansson, Christer
KeywordsMagnetic nanoparticles
Magnetic interactions
Magnetic relaxation
Monte-Carlo simulations
Multi-core particles
Single-core particles
Issue Date2019
PublisherElsevier BV
CitationJournal of Magnetism and Magnetic Materials 477: 198- 202 (2019)
AbstractWe present experimental intrinsic loss power (ILP) values, measured at an excitation frequency of 1 MHz and at relatively low field amplitudes of 3.4–9.9 kA/m, as a function of the mean core diameter, for selected magnetic nanoparticles (MNPs). The mean core sizes ranged from ca. 8 nm to 31 nm. Transmission electron microscopy indicated that those with smaller core sizes (less than ca. 22 nm) were single-core MNPs, while those with larger core sizes (ca. 29 nm to 31 nm) were multi-core MNPs. The ILP data showed a peak at core sizes of ca. 20 nm. We show here that this behaviour correlates well with the predicted ILP values obtained using either a non-interacting Debye model, or via dynamic Monte-Carlo simulations, the latter including core-core magnetic interactions for the multi-core particles. This alignment of the models is a consequence of the low field amplitudes used. We also present interesting results showing that the core-core interactions affect the ILP value differently depending on the mean core size.
Publisher version (URL)http://dx.doi.org/10.1016/j.jmmm.2018.09.117
Identifiersdoi: 10.1016/j.jmmm.2018.09.117
issn: 0304-8853
Appears in Collections:(ICMM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.