Microstructure and magnetic properties of the FePt film on a membrane of anodized aluminium oxide

By making use of the dc magnetron sputtering system, the Au/FePt bilayers have been prepared on a glass substrate and an anodized aluminum oxide (AAO) membrane with an averaged pore diameter of around 20 nm and 200 nm. All the FePt films can be converted into the magnetic hard phase, namely L1₀ phase, after a heat treatment above 500°C for 1 hour. A nanoparticle-like structure can be observed in the 15-nm-thick FePt film on the AAO template. The experimental observations of the structure and the magnetism of the FePt film on AAO template are firstly established.