Title :
Magnetic and structural properties of quaternary (Fe-Co-Ni)50Pt50 alloy thin films
Author :
Suzuki, Takao ; Kanazawa, Hiroshi ; Sakuma, Akimasa
Author_Institution :
Inforniation Storage Mater. Lab., Toyota Technol. Inst., Nagoya, Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
The intrinsic perpendicular magnetic anisotropy constant Ku for (Fe-Co-Ni)50Pt50 quaternary alloy and (Fe-Cr)50Pt50 alloy thin films is discussed as a function of structure and composition. Both Ms and the estimated Ku values obtained by the extrapolation to order parameter S = 1 using the dependence of Ku on S become maximum at the valence electron number nelect = 8, being independent of alloy system. The magnetic anisotropy is determined to the first approximation by the Fermi energy, which changes with the number of electrons, but not by the band structure itself.
Keywords :
Fermi level; cobalt alloys; electron beam deposition; ferromagnetic materials; iron alloys; magnetic thin films; magnetisation; nickel alloys; perpendicular magnetic anisotropy; platinum alloys; (Fe-Co-Ni)50Pt50; (Fe-Cr)50Pt50; (Fe-Cr)50Pt50 alloy thin films; Fermi energy; composition; electron beam evaporation; intrinsic perpendicular magnetic anisotropy constant; magnetic properties; order parameter; quaternary (Fe-Co-Ni)50Pt50 alloy thin films; saturation magnetization; structural properties; valence electron number; Cobalt alloys; Electrons; Iron alloys; Magnetic anisotropy; Magnetic films; Magnetic materials; Magnetic properties; Perpendicular magnetic anisotropy; Platinum alloys; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803103
