High sensitivity GMR with small
     hysteresis in Ni-Fe/Cu multilayers

   M. Urbaniak * urbaniak@ifmpan.poznan.pl, T. Luciski and F.
                       Stobiecki

  Institute of Molecular Physics, Polish Academy of Sciences, PL
        60-179 Pozna, Smoluchowskiego 17, Poland 

  Received 5 May 1998; received in revised form 6 August 1998

Abstract

Giant magnetoresistance (GMR) effect and magnetisation reversal
processes have been investigated in
Py/Cu(Py=Ni83Fe17,permalloy) multilayers (Mls) obtained by
face-to-face sputtering method. The investigated films had
constant sublayer thicknesses both for Py and Cu
(dCu=2nm,dPy=2nm) and various numbers of ferromagnetic
sublayers. It has been shown that for such Mls a high field
sensitivity of GMR effect (S0.4%/Oe) and negligible hysteresis
can be obtained for a low number of Py layers.

Keywords: Exchange coupling; GMR sensitivity;
Magnetoresistance; Multilayer; Permalloy

*Corresponding author