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Surface spin effects in La-doped CoFe.sub.2./sub.O.sub.4./sub. nanoparticles prepared by microemulsion route
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SYSNO ASEP 0367611 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Surface spin effects in La-doped CoFe2O4 nanoparticles prepared by microemulsion route Author(s) Burianová, Simona (FZU-D)
Poltierová Vejpravová, Jana (FZU-D) RID
Holec, Petr (UACH-T) SAI
Plocek, J. (CZ)
Nižňanský, D. (CZ)Source Title Journal of Applied Physics. - : AIP Publishing - ISSN 0021-8979
Roč. 110, č. 7 (2011), "073902-1"-"073902-7"Number of pages 7 s. Language eng - English Country US - United States Keywords CoFe2O4 nanoparticles ; lanthanum doping ; microemulsion route ; high coercivity ; surface spin effects Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100520 - FZU-D (2005-2011) AV0Z40320502 - UACH-T (2005-2011) UT WOS 000295883000063 DOI 10.1063/1.3642992 Annotation A comparative study of pure CoFe2O4 nanoparticles and La-doped CoFe2O4 nanoparticles, prepared by microemulsion route has been performed. The samples were characterized using x-ray diffraction and transmission electron microscopy in order to obtain average particle size. preparation route. The samples were investigated by magnetization measurements, which revealed the coercivity values strongly dependent on particle size, but not significantly on level of La3ţ doping. Detailed in-field Mo¨ssbauer spectroscopy studies were performed in order to determine spin canting angles and cation distribution within the spinel network. The non-negligible canting angles up to 40_ in the La-doped samples were observed. The presence of the spin surface effects was also supported by magnetic measurement as the magnetization did not saturate even in considerably high magnetic fields (7 T). Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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