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Magnetic properties of FeCo nanoparticles encapsulated in carbon

SYSNO ASEP	0343287
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Magnetic properties of FeCo nanoparticles encapsulated in carbon
Author(s)	Maryško, Miroslav (FZU-D)_RID Fajgar, Radek (UCHP-M)_{RID, ORCID, SAI} Šubrt, Jan (UACH-T)_{SAI, RID} Murafa, Nataliya (UACH-T)_{RID, SAI} Knížek, Karel (FZU-D)_{RID, ORCID}
Source Title	Journal of Physics: Conference Series. - : Institute of Physics Publishing - ISSN 1742-6588 Roč. 200, č. 7 (2010), 072065/1-072065/5
Number of pages	5 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	magnetic nanoparticles
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GA203/07/0546 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10100521 - FZU-D (2005-2011)
	AV0Z40720504 - UCHP-M (2005-2011)
	AV0Z40320502 - UACH-T (2005-2011)
DOI	10.1088/1742-6596/200/7/07/2065
Annotation	The as-prepared and heat treated iron/cobalt nanoparticles with r=Co/Fe=0.08 and 1 were obtained by laser decomposition.At low temperatures all the materials are in a ferromagnetic blocked state..At higher temperatures the as-prepared materials exhibit superparamagnetic properties.In this case the nanoparticle size distribution deduced from the m(H) curves and from the susceptibilities was compared with the TEM data.The heat treated materials have larger magnetizations and a maximum 161 emu/g was achieved for the r=1 material treated at 900°C.For this material an anomalous form of the hysteresis loop was explained in terms of a superposition of single and multi-domain magnetizations.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2011

Number of the records: 1