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

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3761

Lastpage

3763

Abstract

The magnetic anisotropy of Pd_xCo_1-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 K_u with the easy axis perpendicular to the film plane. The maximum K_u is about 5×10⁶ erg/cm³ for x=0.35 to 0.50. The compositional dependence of K_u is similar to that of the magnetostriction constant λ₁₁₁, which suggests a magnetostrictive origin. In multilayer films, PdCo/Pt and PdCo/Pd showed positive K_u while PdCo/Cu showed negative K_u. 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42425

Filename

42425