Perpendicular magnetic anisotropy and spin reorientation transition in L10 FePt films

Jae Young Ahn, Nyun Jong Lee, Tae Hee Kim, J. H. Lee, Anny Michel, Dominique Eyidi

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We investigated the thickness and composition dependence of perpendicular magnetic anisotropy (PMA) in L10 Fe1-xPtx (x =0.4, 0.5, and 0.55) films. The FePt films with different thicknesses of 35 and 70 were grown at the substrate temperature Ts = 300°C by molecular beam epitaxy coevaporation technique. A (001)-oriented epitaxial L10 FePt film was grown on the thin (001)-oriented fcc Pt layer, while a poorly crystallized FePt film was formed on the (111)-textured Pt layer. Our results showed that, at a fixed thickness of 70 , the PMA of FePt alloy films is enhanced as Pt content increases from 40 to 55.

Original languageEnglish
Article number07B760
JournalJournal of Applied Physics
Issue number7
StatePublished - 1 Apr 2011

Bibliographical note

Funding Information:
The authors gratefully acknowledge financial support by the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, South Korea and the National Research Foundation of Korea (NRF) through the Quantum Meta-Materials Research Center.


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