Title :
Kerr effect of ordered and disordered Fe1-xPtx(001) alloy films
Author :
Hu, Y.M. ; Huang, J.C.A. ; Huang, S.Y. ; Wu, T.H.
Author_Institution :
Dept. of Electr. Eng., Nan-Jeon Junior Coll. of Technol. & Commerce, Tainan, Taiwan
fDate :
7/1/2001 12:00:00 AM
Abstract :
The (001) oriented Fe1-xPtx alloy films have been grown on Pt seeding layers on MgO(001) substrates by MBE. At growth temperature of 500°C, rather ordered structures were formed for FePt, FePt2, and FePt3 films, which exhibit large perpendicular magnetic anisotropy and Kerr rotations. In contrast, Fe 2Pt and Fe3Pt films were poorly ordered and did not display perpendicular magnetization for similar growth conditions. The optimal growth temperature of the FePt (x=0.5) alloys occurs at about 500°C, and the surface order-disorder transition occurs above 650°C. We demonstrate that chemical ordering is important for perpendicular magnetic anisotropy and Kerr effects for Fe1-xPtx alloy films, which in turn depend strongly on the alloy composition and growth temperature
Keywords :
Kerr magneto-optical effect; iron alloys; magnetic epitaxial layers; molecular beam epitaxial growth; order-disorder transformations; perpendicular magnetic anisotropy; platinum alloys; 500 to 650 C; Fe1-xPtx(001) alloy film; FePt; Kerr rotation; MBE growth; MgO; MgO (001) substrate; Pt; Pt seeding layer; chemical composition; perpendicular magnetic anisotropy; perpendicular magnetization; surface order-disorder transition; Chemicals; Displays; Iron alloys; Kerr effect; Magnetic films; Magnetization; Molecular beam epitaxial growth; Perpendicular magnetic anisotropy; Platinum alloys; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
