The magnetic and transport properties of two series of sputtered ［Ni80Co20(L)/Fe(tFe)］N multilayers (MLs) with different Fe layer thickness of tFe=0.1 and 2nm, and varying L were studied and compared with each other. An enhanced anisotropic magnetoresistance (AMR) peak around L=10nm was observed for annealed films with tFe=0.1nm. The position of the enhanced AMR peak is the same as that of transversal MR peak for the deposited MLs with tFe=2nm. For the as-deposited films with impurity Fe layers, when L becomes lower than the electron mean free path of Ni80Co20 alloy, the zero-field resistivity ρ increases with decreasing L and the increase of ρ will exceed that of AMR (Δρ). The L dependence of ρ can be described by Fuchs-Sondheimer theory. The coercivity Hc of the as-deposited films with tFe=0.1nm increases rapidly with increasing L for L＜15nm and is almost saturated for L＞15nm. The dependence of Hc on Ｌ may be related to the interface structure of MLs, which is indicated by a big drop of Hc in the annealed films. Our experimental data show that the interface scattering in MLs may increase AMR; the magnetic alloy interfacial layers in MLs may change the domain structure and enhance transverse MR and AMR.
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