Bimagnetic nanoparticles with enhanced exchange coupling and energy products

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Bimagnetic nanoparticles with enhanced exchange coupling and energy products

Show simple item record Nandwana, Vikas Chaubey, Girija Shankar Yano, Kazuaki Rong, Chuanbing Liu, J. Ping 2010-08-10T19:05:22Z 2010-08-10T19:05:22Z 2009-01-06 en_US
dc.identifier.citation J. Appl. Phys. 105, 014303 (2009) en_US
dc.identifier.issn 0021-8979 (print)
dc.description Nanoscale Science and Design issue. en_US
dc.description.abstract Bimagnetic FePt/Fe3O4 nanoparticles with core/shell or heterodimer structure have been prepared using a sequential synthetic method. The dimension of both FePt and Fe3O4 was tuned by varying the synthesis parameters. The as-synthesized bimagnetic nanoparticles were superparamagnetic at room temperature. After being annealed in a reducing atmosphere, the FePt/Fe3O4 bimagnetic nanoparticles were converted to a hard magnetic nanocomposite with enhanced energy products due to the exchange coupling between the hard and soft magnetic phases. It was found that the exchange coupling in nanocomposites made from the core/shell nanoparticles is stronger than that from the heterodimer nanoparticles. By tuning the dimensions of the FePt and Fe3O4 phases, the energy product up to 17.8 MGOe was achieved in the annealed nanocomposites, which is 36% higher than the isotropic single-phase FePt counterpart. en_US
dc.language.iso en_US en_US
dc.publisher American Institute of Physics en_US
dc.subject annealing en_US
dc.subject exchange interactions (electron) en_US
dc.subject iron alloys en_US
dc.subject iron compounds en_US
dc.subject magnetic particles en_US
dc.subject nanocomposites en_US
dc.subject nanoparticles en_US
dc.subject nanotechnology en_US
dc.subject permanent magnets en_US
dc.subject platinum alloys en_US
dc.subject soft magnetic materials en_US
dc.subject superparamagnetism en_US
dc.title Bimagnetic nanoparticles with enhanced exchange coupling and energy products en_US
dc.type Article en_US
dc.publisher.department Department of Physics, The University of Texas at Arlington en_US
dc.identifier.externalLink en_US
dc.identifier.externalLinkDescription External link to the published article en_US

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