Abstract
Fe-Pt-Mn thin films were deposited on quartz plates at a substrate temperature of 25-800°C. Three alloy compositions were studied, including Fe 51 Pt 42 Mn 7 , Fe 51 Pt 45 Mn 4 , and Fe 41 Pt 55 Mn 4 . X-ray diffraction data indicate that the addition of Mn stabilizes the FCC FePt disordered phase, and increases the ordering transformation temperature by ∼ 150°C. At high annealing temperatures, the decrease of d 111 lattice spacing for ordered FePt phase implies that Mn atoms dissolve into FCT phase to form a solid solution. The coercivities of Fe-Pt- Mn thin films were found to decrease with the increasing d 111 lattice spacing.
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