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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F01%3A07013169" target="_blank" >RIV/68081723:_____/01:07013169 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Magnetic behaviour of the Fe-C nanopowders prepared by laser synthesis from ethylene / iron pentacarbonyl gas phase mixture.
Original language 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 amountof 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
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2001
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
COST-ACTION 523 Mid term Meeting and Workshop On Nanomaterials: Fundamentals and Applications - Abstracts.
ISBN
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ISSN
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e-ISSN
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Number of pages
1
Pages from-to
55
Publisher name
Department of Physics, University of Limerick
Place of publication
Limerick
Event location
Limerick [IE]
Event date
Oct 4, 2001
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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