Title :
Perpendicular magnetic anisotropy of Pd-Co alloy films and related multilayers
Author :
Tsunashima, S. ; Nagase, K. ; Nakamura, K. ; Uchiyama, S.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
fDate :
9/1/1989 12:00:00 AM
Abstract :
The magnetic anisotropy of PdxCo1-x alloy (0.3⩽x⩽0.85) films and Pd67Co33/NM (NM=Pt, Pd, Cu) multilayers was investigated. Vacuum-deposited PdCo alloy films exhibit uniaxial anisotropy Ku with the easy axis perpendicular to the film plane. The maximum Ku is about 5×106 erg/cm3 for x=0.35 to 0.50. The compositional dependence of Ku is similar to that of the magnetostriction constant λ111, which suggests a magnetostrictive origin. In multilayer films, PdCo/Pt and PdCo/Pd showed positive Ku while PdCo/Cu showed negative Ku. These results suggest that stress-induced anisotropy due to lattice misfit is probably one of the causes of the perpendicular anisotropy in Pd/Co multilayer films
Keywords :
cobalt alloys; magnetic anisotropy; magnetic thin films; magnetostriction; palladium alloys; vacuum deposited coatings; Pd67Co33-Cu; Pd67Co33-Pt; Pd67O33-Pd; compositional dependence; easy axis; lattice misfit; magnetic anisotropy; magnetostriction constant; multilayer films; perpendicular anisotropy; stress-induced anisotropy; uniaxial anisotropy; vacuum deposited films; Anisotropic magnetoresistance; Cobalt alloys; Copper alloys; Lattices; Magnetic anisotropy; Magnetic films; Magnetic multilayers; Magnetostriction; Nonhomogeneous media; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
