Spin Polarization of Alternate Monatomic Epitaxial [Fe/Co]n Superlattice
2012
The spin polarization (P) of alternate monatomic layered (AML) epitaxial [Fe/Co]n superlattices grown on MgO(001) substrates by electron beam (EB) evaporation has been measured by the point contact Andreev reflection (PCAR) method. The intrinsic transport P of 0.60 was obtained for the AML epitaxial [Fe/Co]n superlattice grown at 75 °C, which is comparable to that of half-metallic Heusler alloys measured by PCAR. The AML epitaxial [Fe/Co]n superlattices on MgO(001), which are expected to possess the B2 ordered structure, show the highest spin polarization of metallic Fe–Co alloy films.
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