Title :
The origin of large perpendicular magnetic anisotropy observed in Co3Pt alloy thin films
Author :
Yamada, Yoshiyasu ; Suzuki, Takao ; Lauhoff, Georg L. ; Kanazawa, Hiroshi
Author_Institution :
Inf. Storage Mater. Lab., Toyota Technol. Inst., Nagoya, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
The relation between the perpendicular magnetic anisotropy constant Ku and the order parameter S of the Co3Pt ordered phase is examined. The ordering process is suggested to be governed by a surface diffusion based on the activation energy obtained and annealing experiments. Lowering the deposition rate shows significant improvement in both Ks and S at substrate deposition temperature Ts=330°C. The utilization of a Ru buffer layer does not contribute to obtain higher Ku and S. This may be due to the rougher surface of Ru buffer layer than Al2 O3(00·1) substrate
Keywords :
annealing; cobalt alloys; magnetic thin films; perpendicular magnetic anisotropy; platinum alloys; surface diffusion; 330 degC; Al2O3; Al2O3 substrate; Co3Pt; Co3Pt alloy thin films; Ru buffer layer; activation energy; annealing; deposition rate; large perpendicular magnetic anisotropy; order parameter; ordering process; rougher surface; substrate deposition temperature; surface diffusion; Anisotropic magnetoresistance; Buffer layers; Cobalt alloys; Magnetic anisotropy; Magnetic films; Magnetic materials; Material storage; Perpendicular magnetic anisotropy; Platinum alloys; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
