Abstract
L10 ordered FePt films with (0 0 1) texture and out-of-plane magnetic easy axis were fabricated by rapid thermal annealing of chemically disordered FePt thin films grown on amorphous SiO2 substrates. While keeping the annealing temperature fixed at 800 °C, the influence of the annealing time was investigated in the regime between 5 and 300 s. The evolution of the a and c lattice parameters indicates that the in-plane strain is a key factor for the formation of the (0 0 1) texture. A large tetragonal distortion is found after an annealing time of 5 s whereas a relaxation of the lattice parameters towards bulk values is found for longer annealing times. The dependence of the magnetic properties on the annealing time will be discussed with respect to the observed variation of the structure and morphology of the annealed FePt films.
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