We confirmed the structural properties of trilayered epitaxial films with AML [Fe/Co]n and Au spacer on Au electrode by RHEED and TEM. A considerably large △RA (2.61 mΩμm2) resistance area product was observed in all metallic current perpendicular-to-plane giant magneto-resistance (CPP-GMR) spin-valve elements by using alternate monatomic epitaxial [Fe/Co]n ferromagnetic layer with IrMn layer on the top. The estimated spin scattering asymmetry coefficient β and interface asymmetry coefficient γ was 0.81 and 0.43 ± 0.05, respectively. This value of β is higher than that of Fe50Co50/Cu laminated with Cu spacer or Heusler alloy which is largest value ever reported at room temperature.
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