Abstract
The dependence of magnetoresistance on film thickness and substrate temperature has been studied on 82Ni-Fe alloy films. The anisotropic resistivity Δϱ = ϱ − ϱ⊥ is nearly a constant of about 0.64 μΩcm when the thickness of the films is 200 to 1400 Å. An anisotropic magnetoresistivity ratio (Δϱ/ϱ0) of 2.5 to 3% is obtained in the 1000 to 1200 Å thick films prepared at the substrate temperature of 350 °C. The corresponding magnetic properties are Hc = 2 to 2.5 Oe, Hc⊥ = 0.5 to 0.6 Oe, and Hk = 4 Oe. The resistivity decreases with increasing of the film thickness or substrate temperature. The decrease of resistivity ϱ0 can be understood by considering the decrease of diffused scattering at the film surface or grain boundary. The asymmetry of the Δϱ/ϱ0 vs. H curve is also discussed.
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