Perpendicular Exchange Bias and Magnetic Anisotropy in FePt/FeMn Multilayers

Author

Phuoc, Nguyen N. ; Suzuki, Takao

Author_Institution

Inf. Storage Mater. Lab., Toyota Technol. Inst.

Volume

42

Issue

10

fYear

2006

Firstpage

2996

Lastpage

2998

Abstract

A systematic investigation of parallel and perpendicular exchange bias in FePt/FeMn multilayers is presented. Perpendicular magnetic anisotropy observed in FePt/FeMn multilayers is attributed to the surface anisotropy at the interface of FePt/FeMn. The surface and volume anisotropy constants are found to decrease with increasing temperature. The thickness (FePt) dependence of exchange bias field and blocking temperature are discussed. Of interest is the blocking temperature of the parallel exchange bias is higher than that of the perpendicular one, which is qualitatively explained by assuming that the spins at the FePt/FeMn are tilted

Keywords

ferromagnetic materials; iron alloys; magnetic multilayers; manganese alloys; perpendicular magnetic anisotropy; platinum alloys; FePt-FeMn; magnetic multilayers; perpendicular exchange bias; perpendicular magnetic anisotropy; surface anisotropy; unidirectional anisotropy; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetic multilayers; Material storage; Perpendicular magnetic anisotropy; Reflectivity; Saturation magnetization; Temperature dependence; X-ray scattering; Multilayers; perpendicular exchange bias; perpendicular magnetic anisotropy; surface anisotropy; unidirectional anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.879152

Filename

1704508