Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5365883 | Applied Surface Science | 2008 | 5 Pages |
FePt/B4C multilayer composite films were prepared by magnetron sputtering and subsequent annealing in vacuum. By changing Fe layer thickness of [Fe/Pt]6/B4C films, optimal magnetic property (8.8Â kOe and remanence squareness is about 1.0) is got in [Fe(5.25Â nm)/Pt(3.75Â nm)]6/B4C sample whose composition is Fe rich and near stoichiometric ratio. The characterizations of microstructure demonstrate that the diffusion of B and C atoms into FePt layer depends strongly on B4C interlayer thickness. When B4C interlayer thickness of [Fe(2.625Â nm)/Pt(3.75Â nm)/Fe(2.625Â nm)/B4C]6 films is bigger than 3Â nm, stable value of grain size (6-6.5Â nm), coercivity (6-7Â kOe) and hardness (16-20Â GPa) is observed. Finally, the multifunctional single FePt/B4C composite film may find its way to substitute traditional three-layer structure commonly used in present data storage technology.