Spin scattering asymmetric coefficients and enhanced specific interfacial resistance of fully epitaxial current-perpendicular-to-plane giant magnetoresistance spin valves using alternate monatomic layered Fe/Co_n and a Ag spacer layer

摘要

Using current-perpendicular-to-plane (CPP) giant magnetoresistance (GMR) measurement, we have evaluated the bulk and interface spin scattering asymmetric coefficients, specific interfacial resistance, AR_(F/N), for exchange-biased spin-valves consisting of artificially ordered B2 structure Fe_(50)Co_(50) and Ag spacer layer. Artificially epitaxial ordered Fe_(50)Co_(50) superlattices have been successfully fabricated on MgO (001) substrate by alternate monatomic layer (AML) deposition at a substrate temperature of 75 °C. The structural properties of the full epitaxial trilayer, AML[Fe/Co]_n/Ag/AML[Fe/Co]_n, on the Ag electrode have been confirmed by in situ reflection high-energy electron diffraction and transmission electron diffraction microscopy.