Počet záznamů: 1

Magnetic properties of FeCo nanoparticles encapsulated in carbon

  1. 1.
    0343287 - FZU-D 2011 RIV GB eng J - Článek v odborném periodiku
    Maryško, Miroslav - Fajgar, Radek - Šubrt, Jan - Murafa, Nataliya - Knížek, Karel
    Magnetic properties of FeCo nanoparticles encapsulated in carbon.
    Journal of Physics: Conference Series. Roč. 200, č. 7 (2010), 072065/1-072065/5 ISSN 1742-6588
    Grant CEP: GA ČR GA203/07/0546
    Výzkumný záměr: CEZ:AV0Z10100521; CEZ:AV0Z40720504; CEZ:AV0Z40320502
    Klíčová slova: magnetic nanoparticles
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

    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.
    Trvalý link: http://hdl.handle.net/11104/0185803