Powders with superparamagnetic Fe3C particles studied with Mössbauer spectrometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F10%3A00354265" target="_blank" >RIV/68081723:_____/10:00354265 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Powders with superparamagnetic Fe3C particles studied with Mössbauer spectrometry

Popis výsledku v původním jazyce

Two nanopowders with superparamagnetic Fe3C particles were synthesised by the method of laser-induced pyrolysis of gaseous precursors. Both were characterised by X-ray diffraction, Mössbauer spectrometry and standard magnetic measurements. The mean crystallite size of Fe3C was 3 nm for the first sample and 10 nm for the second sample (Scherrer formula), i.e. it was lower than in our previously studied ferromagnetic Fe 3C-based sample. Fe3C phase in both present samples exhibited by 20 K reduced Curie temperature which is interpreted as a nanosize effect. After annealing of the samples at 1073 K for 30 minutes the Curie temperature of the Fe3C phase in both samples matched its standard bulk value. Beside Fe3C phase also Fe3O4 and carbon black were present in the synthesised samples.

Název v anglickém jazyce

Powders with superparamagnetic Fe3C particles studied with Mössbauer spectrometry

Popis výsledku anglicky

Two nanopowders with superparamagnetic Fe3C particles were synthesised by the method of laser-induced pyrolysis of gaseous precursors. Both were characterised by X-ray diffraction, Mössbauer spectrometry and standard magnetic measurements. The mean crystallite size of Fe3C was 3 nm for the first sample and 10 nm for the second sample (Scherrer formula), i.e. it was lower than in our previously studied ferromagnetic Fe 3C-based sample. Fe3C phase in both present samples exhibited by 20 K reduced Curie temperature which is interpreted as a nanosize effect. After annealing of the samples at 1073 K for 30 minutes the Curie temperature of the Fe3C phase in both samples matched its standard bulk value. Beside Fe3C phase also Fe3O4 and carbon black were present in the synthesised samples.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physics: Conference Series

ISSN

1742-6588

e-ISSN

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Svazek periodika

217

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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