Influence of the Location of the Au Layer on the Formation of the Ordered L10 Phase in FePt–Au Films

The ordering processes during vacuum annealing in the FePt-Au films on the SiO2(100 nm)/Si(001) substrates and separated from them during in situ annealing are studied.Location of an additional (bottom, intermediate, top) Au layer affects on the residual stresses, structure, the disorder-order transition, and magnetic properties of FePt-Au films on substrate.During annealing, diffusion of Au and redistribution of it along the grain boundaries of the L10-FePt phase occurs.An increase of the Au concentration in the grain boundaries reduces the exchange interaction between them and increases the coercivity of the FePt/Au and Au/FePt films.Both films (on the substrate and separated