48th Magnetic Materials Center Seminar
June 25, 2007, 15:30
7th floor seminar room, Sengen
Study of FePt based thin films for Perpendicular Magnetic Recording Media
A. Perumal
Equi-atomic FePt thin films with tetragonal phase and L10 ordering has been known to be a promising candidate for ultrahigh density perpendicular magnetic recording media due to its large magnetocrystalline anisotropy. Over a decade, several attempts have been made to prepare the FePt thin films under various environmental conditions to understand the room temperature structure - property correlation and to extend them for practical applications.
In this presentation, I would be summarizing our previous research works and results on FePt based thin films. At first, the results on FePt:C system prepared by co-sputtering technique directly on MgO substrate held at different substrate temperatures would be presented. Subsequently, the results on FePt:MgO system, prepared in multilayer form in room temperature followed by post annealing at different temperatures, would be discussed. Then, I present the results on FePt:MgO granular structure prepared on Fe-Ta-C soft underlayer. Finally, I would discuss the results on reducing ordering temperature of FePt system with the strain induced phase transition along with problems experienced on further advances.