Experimental evidence of the spin-dependence of electrons reflections in magnetic multilayers
|Bertrand Raquet 3, Etienne Snoeck 1, Christophe Gatel 1, Raphael Serra 1, Jean-Claude Ousset 1, Jean-Baptiste Moussy 2, Alexandre Bataille 2, M. Pannetier 2, M. Gautier-Soyer 2, Jean Marc Broto 3|
1. CEMES-CNRS (CEMES-CNRS), 29, rue Jeanne Marvig, Toulouse F31055, France
The giant magnetoresistance (GMR) of multilayers in the current in plane (CIP) geometry can be understood by considering the spin-dependent scattering effects within the magnetic layers and at the non magnetic/magnetic interfaces. In this paper we experimentally put on view the magnetoresistance effect created only by the spin-dependent reflection of electrons at the interfaces. Two epitaxial systems were studied, consisting of two ferrimagnetic insulators layers at low temperature (CoFe2O4 and Fe3O4) separated by a non magnetic metallic layer (M= Au or Pt). The transport properties indicate that conduction of the CoFe2O4/M/Fe3O4 trilayers take place within the thin metallic layer. An optimal magnetoresistance up to 5 % at 10 K associated to the switching from parallel to anti-parallel configuration of the magnetization of the two ferrite layers has been obtained. It is associated to the spin-dependent interfacial scattering contribution of the CIP-GMR.
Presentation: poster at E-MRS Fall Meeting 2005, Symposium D, by Bertrand Raquet
See On-line Journal of E-MRS Fall Meeting 2005
Submitted: 2005-05-30 15:56 Revised: 2009-06-07 00:44