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Title

Magnetic stability against calcining of microwavesynthesized CoFe2O4 nanoparticles

AuthorsBartolomé, Elena ; Cayado, Pablo ; Ricart, Susagna ; Gázquez, Jaume ; Mundet, Bernat ; Coll, Mariona ; Puig Molina, Teresa ; Obradors, Xavier ; Pellegrin, Eric
KeywordsCobalt ferrite nanoparticles
Ray circular-dichroism
Assisted synthesis
Room-temperature
Mn
Coprecipitation
Oxide
Superconductors
Clusters
Route
Issue Date1-Aug-2016
PublisherRoyal Society of Chemistry (UK)
CitationNew Journal of Chemistry 40(8): 6890-6898 (2016)
AbstractHigh quality CoFe2O4 nanoparticles were synthesized using a one-pot, microwave assisted method, that allows forming stable colloidal solutions in alcoholic solvents, as required for the preparation by Chemical Solution Deposition of hybrid nanocomposite ferromagnetic-high Tc YBa2Cu3O7 superconducting films or devices. We have investigated how the thermal process necessary for the preparation of such epitaxial nanocomposites, involving high temperatures (800 °C) and oxygen partial pressures (1 atm), affects the structure and magnetic properties of the isolated nanoparticles. The NPs were fully characterised by XRD, SQUID, STEM-EELS and XMCD at four different stages of the thermal process. Results show that, despite intermediate changes in the cation distribution occur during the process, the final NP magnetization is stable against the thermal treatment. This result opens up perspectives for the preparation of hybrid YBCO films with embedded magnetic NPs using low-cost chemical-solution methods
Publisher version (URL)http://dx.doi.org/10.1039/C6NJ00705H
URIhttp://hdl.handle.net/10261/150936
DOI10.1039/C6NJ00705H
ISSN1144-0546
Appears in Collections:(ICMAB) Artículos
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