Abstract

Fe Pt : Ti O 2 (001) thin films were deposited on CrRu∕MgO underlayers by dc magnetron cosputtering. The effects of TiO2 content on microstructure and magnetic properties of the epitaxial FePt (001) films were studied. Experimental results showed that even with 20vol% TiO2 doping, FePt films could keep a (001) preferred orientation and perpendicular anisotropy. The FePt:TiO2 (001) film with 5nm grain size, adjustable coercivity, and reduced exchange coupling was obtained by doping 20vol% TiO2 into FePt film, showing great potential as low noise ultrahigh density perpendicular magnetic recording media.

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