Reference : Supraferromagnetic correlations in clusters of magnetic nanoflowers
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/40525
Supraferromagnetic correlations in clusters of magnetic nanoflowers
English
Bender, Philipp Florian mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Honecker, Dirk mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Fernández Barquín, Luis []
25-Sep-2019
Applied Physics Letters
American Institute of Physics
115
132406
Yes
International
0003-6951
1077-3118
Melville
NY
[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.
Researchers
http://hdl.handle.net/10993/40525
10.1063/1.5121234
https://aip.scitation.org/doi/10.1063/1.5121234
FP7 ; 604448 - NANOMAG - Nanometrology Standardization Methods for Magnetic Nanoparticles
FnR ; FNR11661571 > Andreas Michels > SANS4NCC > Advanced Neutron Scattering for Magnetic Nanocomposite Coatings > 01/05/2018 > 30/04/2021 > 2017

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