Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879758
