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Structural and magnetic properties of multilayer system ferromagnetic/metallic separator/ferromagnetic

Marta Duś-Sitek 2Marcin G. Nabiałek 2Barbara Gągorowska 2Michał Szota 1

1. Częstochowa University of Technology, Institute of Materials Ingineering, Armii Krajowej 19, Częstochowa 42-200, Poland
2. Institute of Physics, Częstochowa University of Technology, Al. Armii Krajowej 19, Częstochowa 42-200, Poland

Abstract

This paper presents the investigations of structural and magnetic properties of multilayer system ferromagnetic/metallic separator/ferromagnetic. The investigation factors included structural properties (by means of X-ray dyifraction), surface and interface topology, roughness (X-ray reflectometry) and magnetic properties. Also the impact of both thickness of metallic separator and ferromagnetic sublayers and a number of bilayers repetition on magnetic properties was also investigated. The presented results of the investigation allow for drawing the following conclusions:

  • it was proved on the basics of the investigations of multilayer systems ferromagnetic/metallic separator/ferromagnetic with different thickness of magnetic and non-magnetic layer than presence of ferromagnetic (F-F) and antiferromagnetic (A-F) exchange couplings depend on the quality of layers in artificial superlattice and on the state and type of free surface, superlattice structure and its roughness,
  • it was proved that presence of ferromagnetic (F-F) and antiferromagnetic (A-F) exchange couplings depend on the state and type of free surface,
  • it was proved that presence of ferromagnetic (F-F) and antiferromagnetic (A-F) exchange couplings depend on the superlattice structure and its roughness,
  • antiferromagnetic exchange coupling depends on the thickness of the ferromagnetic layer (tNi = 14Å; 15Å and 16Å),
  • no antiferromagnetic coupling (A-F I and A-F II) was observed for particular thicknesses of non-magnetic layer in multilayer systems, probably due to non-periodical growth of the layers and increased roughness in upper, lower and interface layers.
The results obtained within the work proved that existence of antiferromagnetic exchange coupling in multilayer system (ferromagnetic/metallic separator/ferromagnetic) depends on the quality of manufacturing of the artificial superlattice structure.
 

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Related papers

Presentation: Poster at E-MRS Fall Meeting 2009, Symposium I, by Michał Szota
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-06-10 17:40
Revised:   2009-07-02 14:29