Title :
Magnetic and magneto-optical properties and structure for (Co100-xFex)50Pt50 alloy thin films
Author :
Kanazawa, H. ; Ahmad, E. ; Lauhoff, G. ; Suzuki, T.
Author_Institution :
Toyota Technol. Inst., Nagoya, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
The intrinsic perpendicular magnetic anisotropy constant Ku of (Co100-xFex)50Pt50 (0⩽×⩽100) alloy thin films is determined at room temperature. It is found to increase with order parameter S, and decrease with the tetragonality c/a for all compositions. The estimated Ku values obtained by the extrapolation to S=1 are nearly identical for x from 0 to 56, but increase for x beyond 56. The polar Kerr rotation is found to become more enhanced for photon energies near 1.4~3.5 eV and 4~6.8 eV with increasing x. Observations of domain structures in Fe50Pt50 thin films reveal an induced in-plane magnetic anisotropy when the thickness exceeds 1000 Å
Keywords :
Kerr magneto-optical effect; cobalt alloys; ferromagnetic materials; induced anisotropy (magnetic); iron alloys; magnetic domains; magnetic thin films; perpendicular magnetic anisotropy; platinum alloys; vacuum deposited coatings; (Co100-xFex)50Pt50 alloy thin films; (CoFe)50Pt50; 1.4 to 3.5 eV; 100 to 3800 angstrom; 4 to 6.8 eV; Fe50Pt50; Fe50Pt50 thin films; MgO; MgO(100) substrate; domain structures; electron beam evaporation; induced in-plane magnetic anisotropy; intrinsic perpendicular magnetic anisotropy constant; magnetic properties; magneto-optical properties; order parameter; polar Kerr rotation; room temperature; tetragonality; thickness; Iron; Magnetic analysis; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetooptic effects; Magnetooptic recording; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
