Structure and Magnetic Properties of Graded (001)-Oriented FePt Films Prepared by Magnetron Sputtering and Rapid Thermal Annealing
Journal Article
·
· Journal of Superconductivity and Novel Magnetism
- Jilin Normal University, Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education (China)
L1{sub 0}-FePt/[Fe/Pt]{sub 27} multilayer films were prepared on (100)-oriented single-crystal MgO substrates. Structural analysis indicates epitaxial growth of the L1{sub 0}-FePt films during high-temperature deposition. The room-temperature-deposited [Fe/Pt]{sub 27} multilayer exhibits the fcc-FePt structure grown epitaxially on the L1{sub 0}-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 {sup ∘}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 {sup ∘}C due to improved ordering of the top layer.
- OSTI ID:
- 22773722
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 10 Vol. 31; ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
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