Abstract
Nanocomposite FePt–C thin films were prepared by a pulsed filteredvacuum arc deposition technique. The films were characterized bynon-Rutherford backscattering spectrometry, x-ray diffraction, andmagnetic force microscopy. The dependence of magnetic propertiesagainst annealing temperature was studied by using a vibrating samplemagnetometer. Both x-ray diffraction and magnetic force microscopyanalyses confirmed the formation of nano-crystallites offace-centred-tetragonal phase of FePt in the carbon matrixafter annealing at a sufficiently high temperature. For the film with acomposition of (Fe0.55Pt0.45)0.78C0.22, thecoercivity and the grain size were observed to increase with increasingannealing temperature, up to a value of 3.5 kOe at an annealingtemperature of 650 degrees C, and with a grain size about 10.5 nm.
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