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dc.contributor.authorRohit Medwal-
dc.contributor.authorSanjeev Gautam-
dc.contributor.authorSurbhi Gupta-
dc.contributor.authorKandasami Asokan-
dc.contributor.authorGulam Roshan Deen-
dc.contributor.authorRajdeep Singh Rawat-
dc.contributor.authorRam Singh Katiyar-
dc.contributor.authorSubramanian Annapoorni-
dc.identifier.citationVOL 9-5504105-
dc.description.abstractHeated dot magnetic recording (HDMR) technology promises to achieve ultrahigh storage density well above 4 Tb/in(2) by making use of L1(0) FePt bimetallic islands HDMR media require the development of thermally stable, noninteracting magnetic patterns to circumvent the signal noise and writability challenges We prepared self-stabilized carbon-L1(0) FePt nanoparticles (NPs) with average diameter of about 7.2 nm for the HDMR media FePt NPs synthesized by chemical reduction using oleic acid and oleylamine transform to the carbon-L1(0) FePt phase with optimized heat treatment at 873 K. The high-temperature annealing not only helps to achieve the desired L1(0) phase but also helps in the formation of a carbon coating on the FePt NPs due to degradation of the organic cap We investigated the effect of carbon coating on the electronic states of Fe using X-ray absorption measurements and corroborated with high-resolution transmission electron microscopy and Fourier-transform infrared spectroscopy X-ray magnetic circular dichroism reveals the presence of magnetocrystalline anisotropy in the carbon-L1(0) FePt NPs, which is also supported by the structural and magnetic measurements A magnetization-field loop at 300 K shows high coercivity of approximate to 1.6 T. The synthesized carbon-L1(0) FePt NPs can be used as FePt islands and should be suitable for high-density HDMR media.-
dc.publisherIEEE Magnetics Letters-
dc.subjectHard magnetic materials-
dc.subjectheated dot magnetic recording-
dc.titleSelf-Stabilized Carbon-L10 FePt Nanoparticles for Heated Dot Recording Media-
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