About: Correlation of crystal structure and magnetic properties of Co(1-x)NixFe2O4/SiO2 nanocomposites

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The Co(1_x)NixFe2O4/SiO2 (x = 0.0,0.2,0.4,0.6,0.8,1.0) nanocomposites were prepared using the sol–gel method and characterized by Powder X-ray Diffraction (PXRD), Mössbauer spectroscopy and magnetic measurements. The PXRD measurements confirmed the presence of the spinel phase in all samples with particle diameters varying between 15 and 24 nm. The ZFC and FC measurements of the magnetization showed that the blocking temperature is well above the room temperature for all samples. Both the coercivity and the saturation magnetization decrease linearly with increasing content of the Ni2+ ions. The room temperature Mössbauer spectra exhibit a sextet with asymmetric lines indicating a different crystal environment for the Fe3+ ions. By application of the external magnetic field at 4.2 K, these overlapped sextets split up allowing determination of the ratio of the Fe3+(Oh)/Fe3+(Td). The obtained results are discussed considering influence of the Ni doping. The Co(1_x)NixFe2O4/SiO2 (x = 0.0,0.2,0.4,0.6,0.8,1.0) nanocomposites were prepared using the sol–gel method and characterized by Powder X-ray Diffraction (PXRD), Mössbauer spectroscopy and magnetic measurements. The PXRD measurements confirmed the presence of the spinel phase in all samples with particle diameters varying between 15 and 24 nm. The ZFC and FC measurements of the magnetization showed that the blocking temperature is well above the room temperature for all samples. Both the coercivity and the saturation magnetization decrease linearly with increasing content of the Ni2+ ions. The room temperature Mössbauer spectra exhibit a sextet with asymmetric lines indicating a different crystal environment for the Fe3+ ions. By application of the external magnetic field at 4.2 K, these overlapped sextets split up allowing determination of the ratio of the Fe3+(Oh)/Fe3+(Td). The obtained results are discussed considering influence of the Ni doping. (en)
Title	Correlation of crystal structure and magnetic properties of Co(1-x)NixFe2O4/SiO2 nanocomposites Correlation of crystal structure and magnetic properties of Co(1-x)NixFe2O4/SiO2 nanocomposites (en)
skos:prefLabel	Correlation of crystal structure and magnetic properties of Co(1-x)NixFe2O4/SiO2 nanocomposites Correlation of crystal structure and magnetic properties of Co(1-x)NixFe2O4/SiO2 nanocomposites (en)
skos:notation	RIV/68378271:_____/13:00394535!RIV14-AV0-68378271
http://linked.open...avai/predkladatel	Fyzikální ústav AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	I P Z
http://linked.open...avai/riv/aktivity	I, P(GAP108/10/1250), P(LM2011025), Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	MAY
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Poltierová Vejpravová, Jana Burianová, Simona
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	67140
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/13:00394535
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	spinel ferrite; in-field Mössbauer spectroscopy; sol-gel method; nanocomposite (en)
http://linked.open.../riv/klicoveSlovo	in-field Mössbauer spectroscopy nanocomposite spinel ferrite sol-gel method
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[392A8F1D4667]
http://linked.open...i/riv/nazevZdroje	Journal of Magnetism and Magnetic Materials
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Multifunctional nanoparticles: smart preparation methods and study of their physical properties MLTL - Magnetism and Low Temperature Laboratories - operation and development of national research infrastructure
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	334
http://linked.open...iv/tvurceVysledku	Holec, Petr Nižňanský, D. Vejpravová, Jana Kubíčková, Simona
http://linked.open...ain/vavai/riv/wos	000315744100017
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	0304-8853
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jmmm.2013.01.005

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