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Curie temperatures of annealed FePt nanoparticle systems

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Curie temperatures of annealed FePt nanoparticle systems

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dc.contributor.author Rong, Chuanbing
dc.contributor.author Li, Yang
dc.contributor.author Liu, J. Ping
dc.date.accessioned 2010-08-09T21:22:06Z
dc.date.available 2010-08-09T21:22:06Z
dc.date.issued 2007-03-28 en_US
dc.identifier.citation J. Appl. Phys. 101, 09K505 (2007) en_US
dc.identifier.uri http://hdl.handle.net/10106/4990
dc.description PROCEEDINGS OF THE TENTH JOINT Magnetic and Magnetic Materials (MMM)/INTERMAG CONFERENCE / Hard Magnetic Materials en_US
dc.description.abstract The chemically synthesized FexPt100-x nanoparticles with controlled compositions were annealed to transfer the disordered face-centered-cubic structure to the ordered structure. It was found that the L10 FePt structure can be formed in the wide compositional region of x=40–68, and lower or higher Fe content leads to formation of the L12 FePt3 or Fe3Pt phase, respectively. The Néel temperature of L12 FePt3 phase and Curie temperatures (TC) of L10 FePt and L12 Fe3Pt phases are all strongly composition dependent. The room-temperature saturation magnetization has an abnormal dependence on x which is caused by the low TC of Fe3Pt phase with x=75–79. The big difference in TC between the heating and cooling thermomagnetic curves of the Fe–Pt alloys with x=79–90 can be attributed to the difference of α⇔γ phase transition temperature during heating and cooling. On the other hand, TC of the L10 FePt nanoparticles was found to be strongly size dependent. en_US
dc.description.sponsorship Jointly sponsored by the American Institute of Physics and Magnetics Society of the IEEE in cooperation with the Minerals, Metals and Materials Society, The Office of Naval Research, The American Society for Testing and Materials, The American Physical Society, and The American Ceramics Society. en_US
dc.language.iso en_US en_US
dc.publisher American Institute of Physics en_US
dc.subject iron alloys en_US
dc.subject platinum alloys en_US
dc.subject ferromagnetic materials en_US
dc.subject Curie temperature en_US
dc.subject Neel temperature en_US
dc.subject nanoparticles en_US
dc.subject magnetic particles en_US
dc.subject particle size en_US
dc.subject annealing en_US
dc.subject cooling en_US
dc.subject magnetisation en_US
dc.subject magnetocaloric effects en_US
dc.subject order-disorder transformations en_US
dc.title Curie temperatures of annealed FePt nanoparticle systems en_US
dc.type Article en_US
dc.publisher.department Department of Physics, The University of Texas at Arlington en_US
dc.identifier.externalLink http://link.aip.org/link/JAPIAU/v101/i9/p09K505/s1 en_US
dc.identifier.externalLinkDescription External link to the published article en.US

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