About: Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture.

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About: Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture. Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Nanopowders of the Fe-C based material were prepared by laser irradiation of the Fe(CO)5 vapors mixed with C2H4 as a carrier gas. The as prepared powder was characterized by TEM, XRD and IR. Magnetic behaviour was investigated using Mössbauer spectroscopy and magnetic measurements. In the sample of the as prepared state there were identified bcc alpha-Fe, Fe3C and iron oxide phases in agreement of all methods applied. Comparison of Mössbauer spectra taken at 300K and at 20K shows that prevailing amount of oxide particles exhibits superparamagnetic behaviour. The hysteresis loop corresponds well to an assembly of nanoparticles. In the thermomagnetic curve (measured in vacuum at increasing temperature up to 800 C) critical temperatures of the phases alpha-Fe, Fe3C and gamma-Fe2O3 can be identified. The part of the curve corresponding to decreasing temperature and subsequent measurement of the Mössbauer spectra witnesses that changes in the phase composition of the sample occurred. During the heatingat Nanopowders of the Fe-C based material were prepared by laser irradiation of the Fe(CO)5 vapors mixed with C2H4 as a carrier gas. The as prepared powder was characterized by TEM, XRD and IR. Magnetic behaviour was investigated using Mössbauer spectroscopy and magnetic measurements. In the sample of the as prepared state there were identified bcc alpha-Fe, Fe3C and iron oxide phases in agreement of all methods applied. Comparison of Mössbauer spectra taken at 300K and at 20K shows that prevailing amount of oxide particles exhibits superparamagnetic behaviour. The hysteresis loop corresponds well to an assembly of nanoparticles. In the thermomagnetic curve (measured in vacuum at increasing temperature up to 800 C) critical temperatures of the phases alpha-Fe, Fe3C and gamma-Fe2O3 can be identified. The part of the curve corresponding to decreasing temperature and subsequent measurement of the Mössbauer spectra witnesses that changes in the phase composition of the sample occurred. During the heatingat (en)
Title	Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture. Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture. (en)
skos:prefLabel	Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture. Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture. (en)
skos:notation	RIV/68081723:_____/01:07013169!RIV/2003/AV0/A07003/N
http://linked.open.../vavai/riv/strany	55
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(KSK1010104), P(OC 523.20), Z(AV0Z2041904)
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	David, Bohumil Schneeweiss, Oldřich Vondráček, Martin
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	685688
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/01:07013169
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanopowder; laser synthesis; Mössbauer spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	nanopowder laser synthesis Mössbauer spectroscopy
http://linked.open...ontrolniKodProRIV	[BDE0005786C0]
http://linked.open...v/mistoKonaniAkce	Limerick [IE]
http://linked.open...i/riv/mistoVydani	Limerick
http://linked.open...i/riv/nazevZdroje	COST-ACTION 523 Mid term Meeting and Workshop On Nanomaterials: Fundamentals and Applications - Abstracts.
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Condensed matter physics and materials science http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20523.20
http://linked.open...UplatneniVysledku	2001
http://linked.open...iv/tvurceVysledku	David, Bohumil Schneeweiss, Oldřich Vondráček, Martin Morjan, I. Alexandrescu, R.
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2001-10-04 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Behavior and properties of metallic and non-metallic materials in relation to their structure, research on processes leading to degradation of material quality
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Department of Physics, University of Limerick

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