References of "Fernández Barquín, Luis"
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See detailSupraferromagnetic correlations in clusters of magnetic nanoflowers
Bender, Philipp Florian UL; Honecker, Dirk UL; Fernández Barquín, Luis

in Applied Physics Letters (2019), 115

Magnetic nanoflowers are densely packed aggregates of superferromagnetically coupled iron oxide nanocrystallites, which excel during magnetic hyperthermia experiments. Here, we investigate the nature of ... [more ▼]

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. [less ▲]

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See detailMicrostructural-defect-induced Dzyaloshinskii-Moriya interaction
Michels, Andreas UL; Mettus, Denis; Titov, Ivan UL et al

in Physical Review. B, Condensed Matter (2019), 99

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See detailMagnetic small-angle neutron scattering on bulk metallic glasses: A feasibility study for imaging displacement fields
Mettus, Denis UL; Deckarm, Michael; Leibner, Andreas et al

in Physical Review Materials (2017), 1

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