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Thermal Treatment of Chains of Amorphous Fe1–xCox Nanoparticles Made by Magnetic-Field-Induced Coreduction Reaction

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dc.abstract.enThe thermal treatment of chains composed of amorphous Fe 1–x Co x nanoparticles in two different oxygen atmospheres was studied. The nanostructures were manufactured using a magnetic-field-induced coreduction reaction, in which the precursor solutions containing 1:3 and 3:1 proportions of Fe 2+ and Co 2+ ions were reduced with sodium borohydride. The as-prepared nanochains were then heated for 30 min at 400 and 500 °C in dry air or argon containing about 1% oxygen. These processes led to their oxidation, and, as a result, the thermally treated Fe 1–x Co x nanochains were transformed into cobalt ferrite. Heating at 500 °C in the air-containing atmosphere caused the nanomaterials to lose their nanochain structures. In accordance to room-temperature magnetic measurements, the as-prepared and thermally treated Fe 1–x Co x nanochains were ferromagnetic. The highest saturation magnetization ( M S ) was measured for the Fe 1–x Co x nanochains treated at 400 °C in dry air (105 A·m 2 /kg and 154 A·m 2 /kg for Fe 0.25 Co 0.75 and Fe 0.75 Co 0.25 , respectively), whereas the lowest M S was found for the Fe 0.25 Co 0.75 heated at 500 °C in dry air (17 A·m 2 /kg) and the Fe 0.75 Co 0.25 heated at 500 °C in argon (16 A·m 2 /kg).
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKrajewski, Marcin
dc.contributor.authorTokarczyk, Mateusz
dc.contributor.authorStefaniuk, Tomasz
dc.contributor.authorLewińska, Sabina
dc.contributor.authorŚlawska-Waniewska, Anna
dc.date.accessioned2024-01-26T09:52:13Z
dc.date.available2024-01-26T09:52:13Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.volume10
dc.identifier.doi10.1109/LMAG.2019.2950644
dc.identifier.issn1949-307X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/121801
dc.identifier.weblinkhttp://dx.doi.org/10.1109/LMAG.2019.2950644
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofIEEE Magnetics Letters
dc.relation.pages6108405-1-5
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enNanomagnetics
dc.subject.enFeCo nanochains
dc.subject.enmagnetic-field-induced synthesis
dc.subject.enthermal treatment
dc.titleThermal Treatment of Chains of Amorphous Fe1–xCox Nanoparticles Made by Magnetic-Field-Induced Coreduction Reaction
dc.typeJournalArticle
dspace.entity.typePublication