Exchange Bias in Annealed [Pt/Co]/NiFe Systems

Author

Bollero, A. ; Buda-Prejbeanu, L.D. ; Baltz, V. ; Rodmacq, B. ; Dieny, B.

Author_Institution

C.E.A/C.N.R.S, SPINTEC

Volume

42

Issue

10

fYear

2006

Firstpage

2990

Lastpage

2992

Abstract

Exchange bias without antiferromagnetic layer was observed in systems consisting of two exchange coupled ferromagnetic materials: (Pt/Co)_n multilayer (with out-of-plane anisotropy) and permalloy, NiFe, (with in-plane anisotropy). We investigated the influence of various parameters on this phenomenon: Pt buffer layer thickness, number of repeats in the multilayer, thickness of the NiFe layer. Annealing yields a doubling in the magnitude of the loop shift as a result of an improved texture and mosaicity of the films

Keywords

Permalloy; buffer layers; cobalt alloys; coercive force; ferromagnetic materials; magnetic annealing; perpendicular magnetic anisotropy; platinum alloys; (Pt/Co)_n multilayer; Pt buffer layer thickness; Pt-Co-NiFe; coercive field; exchange bias; exchange coupled ferromagnetic materials; film mosaicity; in-plane anisotropy; magnetic annealing; permalloy; perpendicular anisotropy; Anisotropic magnetoresistance; Annealing; Antiferromagnetic materials; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Magnetic materials; Magnetic multilayers; Nonhomogeneous media; Saturation magnetization; Coercive field; exchange bias; perpendicular anisotropy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.879758

Filename

1704506