Synthesis and magnetic properties of Co.sub.1-x./sub.Zn.sub.x./sub.Fe.sub.2./sub.O.sub.4+γ./sub. nanoparticles as materials for magnetic fluid hyperthermia

0352734 - FZÚ 2011 RIV NL eng J - Journal Article
Veverka, Miroslav - Veverka, Pavel - Jirák, Zdeněk - Kaman, Ondřej - Knížek, Karel - Maryško, Miroslav - Pollert, Emil - Závěta, Karel
Synthesis and magnetic properties of Co_1-xZn_xFe₂O_4+γ nanoparticles as materials for magnetic fluid hyperthermia.
Journal of Magnetism and Magnetic Materials. Roč. 322, č. 16 (2010), s. 2386-2389. ISSN 0304-8853. E-ISSN 1873-4766
R&D Projects: GA AV ČR KAN200200651; GA AV ČR KJB100100701; GA MŠMT MEB090901
Institutional research plan: CEZ:AV0Z10100521
Keywords : magnetic nanoparticle * cobalt zinc ferrite * precipitation * magnetic behavior * magnetic fluid hyperthermia
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.689, year: 2010

Nanoparticles of the single spinel phase Co1-xZnxFe2O4+γ of mean size 3 nm – 23 nm, as determined by X–ray diffraction analysis, were synthesized by the co-precipitation method followed by a temperature treatment. Magnetic studies carried out in the range of 4.5 – 550 K revealed gradual transition from ferrimagnetic to superparamagnetic to paramagnetic behaviour depending on the composition and particle size. The observed behaviour indicates a broad distribution of volume sizes of the nanoparticles. Particular importance can be ascribed to the composition of x = 0.6 where the observed transition temperature to the paramagnetic state at 310 – 334 K suggests applicability of this material for magnetic fluid hyperthermia in a self controlled regime.
Permanent Link: http://hdl.handle.net/11104/0192178