Structure and Magnetic Properties of Graded (001)-Oriented FePt Films Prepared by Magnetron Sputtering and Rapid Thermal Annealing
- 94 Downloads
L10-FePt/[Fe/Pt]27 multilayer films were prepared on (100)-oriented single-crystal MgO substrates. Structural analysis indicates epitaxial growth of the L10-FePt films during high-temperature deposition. The room-temperature-deposited [Fe/Pt]27 multilayer exhibits the fcc-FePt structure grown epitaxially on the L10-FePt base layer. The degree of chemical order and thereby the anisotropy of the top layer has been controlled by varying the temperature of a post-deposition annealing process. Compared with the as-deposited films, coercivities of the films annealed below 400 ∘C are substantially decreased by introducing the formation of a graded anisotropy in the partially ordered top layer. Coercivities decrease for annealing temperatures that are greater than 400 ∘C due to improved ordering of the top layer.
KeywordsFePt Thin film Coercivity Texture
This work is financially supported by the National Natural Science Foundation of China under Grant No. 51571072.
- 4.Weller, D., McDaniel, T.: Media for extremely high density recording. In: Sellmyer, D., Skomski, R. (eds.) Advanced Magnetic Nanostructures, p 295. Springer, Berlin (2006)Google Scholar