Phase Transformation and Magnetic Hardening in Isolated FePt Nanoparticles

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Phase Transformation and Magnetic Hardening in Isolated FePt Nanoparticles

Show simple item record Liu, J. Ping Rong, Chuan-bing Nandwana, Vikas Poudyal, Narayan Chaubey, Girija S. 2010-08-23T19:26:16Z 2010-08-23T19:26:16Z 2009-07
dc.identifier.citation IEEE Transactions on Nanotechnology 8.4 (2009):437-443 en_US
dc.identifier.issn 1536-125X
dc.description Manuscript received December 16, 2008; revised February 24, 2009. First published March 31, 2009; current version published July 9, 2009. en_US
dc.description.abstract Isolated monodisperseL10 FePt nanoparticles coated by carbon were obtained by adding enough surfactants that decomposed into carbon after the chemical synthesis and postannealing of the A1 FePt nanoparticles. The effect of isolation between FePt nanoparticles on the phase transition temperature and magnetic properties has been studied systematically by thermal, magnetic, and structural characterizations and analyses. It was found that the A1 to L10 phase transition temperature is dependent sensitively on the amount of isolation medium. The transition temperature shift reaches 150–200 ◦C from nonisolated particle assemblies to completely isolated particles, which may be attributed to the high activation energy of the phase transformation for the isolated particles. en_US
dc.description.sponsorship This work was supported by the US Department of Defense (DoD)/Multidisciplinary University Research Initiative (MURI) Grant N00014-05-1-0497, and by the Center of Nanostructured Materials and Characterization Center for Materials and Biology at the University of Texas at Arlington. en_US
dc.language.iso en_US en_US
dc.publisher IEEE Xplore en_US
dc.publisher IEEE en_US
dc.subject Isolated L10 FePt nanoparticles en_US
dc.subject magnetic hardening en_US
dc.subject magnetocrystalline anisotropy en_US
dc.subject phase transformation en_US
dc.title Phase Transformation and Magnetic Hardening in Isolated FePt Nanoparticles 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 Link to Research Profiles en_US

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