Spin dynamics in interdiffused NiFe/Mn exchange biased bilayers

Author

Ben Youssef, J. ; Spenato, D. ; Le Gall, H.

Author_Institution

Lab. de Magnetime de Bretagne, CNRS/UMR, Brest, France

fYear

2002

Abstract

Summary form only given. Irreversible measurements (such as M-H curve) are commonly used to quantify the unidirectional exchange coupling in F/AF bilayers. Reversible experimental techniques, such as ferromagnetic resonance and ac susceptibility are also employed but lead to different values for the exchange field. We have shown recently that a strong exchange field strength may be induced in NiFe/Mn bilayers after annealing. In order to study the effect of interdiffusion due to heat treatment, the exchange anisotropy field has been investigated in NiFe/Mn bilayers with different NiFe thicknesses from FMR and complex permeability spectra performed under and without external magnetic field.

Keywords

annealing; chemical interdiffusion; exchange interactions (electron); ferromagnetic materials; ferromagnetic resonance; iron alloys; magnetic anisotropy; magnetic multilayers; magnetic permeability; manganese; nickel alloys; spin dynamics; F/AF bilayers; FMR; M-H curve; NiFe thickness; NiFe-Mn; annealing; complex permeability spectra; exchange anisotropy field; exchange field strength; external magnetic field effects; ferromagnetic resonance; interdiffused NiFe/Mn exchange biased bilayers; spin dynamics; unidirectional exchange coupling; Annealing; Antiferromagnetic materials; Damping; Frequency measurement; Magnetic field measurement; Magnetic resonance; Magnetic resonance imaging; Magnetization; Permeability measurement; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International

Conference_Location

Amsterdam, The Netherlands

Print_ISBN

0-7803-7365-0

Type

conf

DOI

10.1109/INTMAG.2002.1001207

Filename

1001207