Reference : Supraferromagnetic correlations in clusters of magnetic nanoflowers

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/40525

Title :	Supraferromagnetic correlations in clusters of magnetic nanoflowers
Language :	English
Author, co-author :	Bender, Philipp Florian [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Honecker, Dirk [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Fernández Barquín, Luis []
Publication date :	25-Sep-2019
Journal title :	Applied Physics Letters
Publisher :	American Institute of Physics
Volume :	115
Pages :	132406
Peer reviewed :	Yes
Audience :	International
ISSN :	0003-6951
e-ISSN :	1077-3118
City :	Melville
Country :	NY
Abstract :	[en] Magnetic nanoflowers are densely packed aggregates of superferromagnetically coupled iron oxide nanocrystallites, which excel during magnetic hyperthermia experiments. Here, we investigate the nature of the moment coupling within a powder of such nanoflowers using spin-resolved small-angle neutron scattering. Within the powder, the nanoparticles are agglomerated to clusters, and we can show that the moments of neighboring nanoflowers tend to align parallel to each other. Thus, the whole system resembles a hierarchical magnetic nanostructure consisting of three distinct levels, i.e., (i) the ferrimagnetic nanocrystallites as building blocks, (ii) the superferromagnetic nanoflowers, and (iii) the supraferromagnetic clusters of nanoflowers. We surmise that such a supraferromagnetic coupling explains the enhanced magnetic hyperthermia performance in the case of interacting nanoflowers.
Target :	Researchers
Permalink :	http://hdl.handle.net/10993/40525
DOI :	10.1063/1.5121234
Other URL :	https://aip.scitation.org/doi/10.1063/1.5121234
Framework Programme / European Project :	FP7 ; 604448 - NANOMAG - Nanometrology Standardization Methods for Magnetic Nanoparticles
FnR project :	FnR ; FNR11661571 > Andreas Michels > SANS4NCC > Advanced Neutron Scattering for Magnetic Nanocomposite Coatings > 01/05/2018 > 30/04/2021 > 2017

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