Magnetic properties of Fe-Pt-Mn thin films

Fe-Pt-Mn thin films were deposited on quartz plates at a substrate temperature of 25-800degreesC. Three alloy compositions were studied, including Fe51Pt42Mn7, Fe51Pt45Mn4, and Fe41Pt55Mn4. X-ray diffraction data indicate that the addition of Mn stabilizes the FCC FePt disordered phase, and increases the ordering transformation temperature by similar to150degreesC. 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. (C) 2004 Elsevier B.V. All rights reserved.