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dc.contributor.authorSun, Xiangcheng
dc.contributor.authorKang, Shishou
dc.contributor.authorHarrell, J. W.
dc.contributor.authorNikles, David E.
dc.contributor.authorDai, Z. R.
dc.contributor.authorLi, Jing
dc.contributor.authorWang, Z. L. (Zhong Lin)
dc.date.accessioned2009-03-17T14:52:32Z
dc.date.available2009-03-17T14:52:32Z
dc.date.issued2003-05-15
dc.identifier.citationJournal of Applied Physics, 93 (2003) 7337-7339en
dc.identifier.issn0021-8979
dc.identifier.urihttp://hdl.handle.net/1853/27255
dc.description©2003 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?JAPIAU/93/7337/1en
dc.descriptionDOI:10.1063/1.1543863
dc.description.abstractFePtCu nanoparticles with varying composition were prepared by the simultaneous polyol reduction of platinum acetylacetonate and copper bis(2,2,6,6-tetramethyl-3,5-heptanedionate) and the thermal decomposition of iron pentacarbonyl. As prepared the particles had a fcc structure with an average diameter of 3.5 nm and were superparamagnetic. Heat treatment of the self-assembled films at temperatures above 550 °C transformed the particles from the fcc to the L1₀ phase, give in-plane coercivities as high as 9000 Oe. X-ray diffraction revealed that the Cu remained in the films and the presence of an extra peak, indicating a second phase was present. Consistent with two or more phases, the magnetic hysteresis curves could be decomposed into a hard component (H[subscript c]c>5000 Oe) and a soft component (H[subscript c]c<2000 Oe). Unlike our earlier results for Ag in FePt, adding Cu to FePt did not lower the temperature required for phase transformation from the fcc to the L1₀ phase.en
dc.language.isoen_USen
dc.publisherGeorgia Institute of Technologyen
dc.subjectIron alloysen
dc.subjectPlatinum alloysen
dc.subjectCopper alloysen
dc.subjectNanoparticlesen
dc.subjectMagnetic particlesen
dc.subjectMagnetic thin filmsen
dc.subjectPyrolysisen
dc.subjectMaterials preparationen
dc.subjectParticle sizeen
dc.subjectSuperparamagnetismen
dc.subjectHeat treatmenten
dc.subjectSolid-state phase transformationsen
dc.subjectCoercive forceen
dc.subjectX-ray diffractionen
dc.subjectPhase separationen
dc.subjectMagnetic hysteresisen
dc.subjectFerromagnetic materialsen
dc.subjectMagnetic recordingen
dc.titleSynthesis, chemical ordering, and magnetic properties of FePtCu nanoparticle filmsen
dc.typeArticleen
dc.contributor.corporatenameGeorgia Institute of Technology. School of Materials Science and Engineering
dc.contributor.corporatenameUniversity of Alabama. Center for Materials for Information Technology
dc.publisher.originalAmerican Institute of Physics


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