Bilinear and biquadratic interlayer exchange coupling in ferromagnet-nonmagnetic metal multilayer film

Author

Guslienko, Konstantin Yu.

Author_Institution

Lab. of Theoretical and Mathematical Physics, Inst. of Metal Phys., Kiev, Ukraine

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

757

Lastpage

759

Abstract

The model of biquadratic exchange coupling is extended by taking into account the demagnetizing, anisotropy fields and nonlocal interlayer bilinear exchange coupling. Biquadratic exchange coupling constant B₁₂ absolute value reduces due to finite correlation length of the magnetization fluctuations. The cases when the fluctuation contribution to energy density is not reduced to the biquadratic form are considered. B₁₂ reveals a likely magnetic anisotropy at film magnetizing if ferromagnetic layer thickness is sufficiently small. The experiments on multilayer Co/X (X is nonmagnetic metal) films are discussed

Keywords

cobalt; demagnetisation; exchange interactions (electron); ferromagnetic properties of substances; magnetic anisotropy; magnetic multilayers; metallic superlattices; Co; anisotropy fields; correlation length; demagnetizing, anisotropy fields; ferromagnet-nonmagnetic metal multilayer film; interlayer exchange coupling; magnetization fluctuations; Anisotropic magnetoresistance; Chromium; Couplings; Fluctuations; Magnetic anisotropy; Magnetic films; Magnetization; Nonhomogeneous media; Perpendicular magnetic anisotropy; Physics;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312399

Filename

312399