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- W2073380532 abstract "Co-Re metallic superlattices were prepared that show antiferromagnetic exchange coupling and enhanced saturation magnetoresistance for particular values of the Re spacer thickness. We report studies on films with the structure glass /150 Å Re/[13 ÅCo/tRe]16/50 Å Re, with tRe ranging from 3 to 40 Å. These structures were grown by magnetron sputtering in a system with a base pressure of 1×10−7 Torr with deposition rates of 0.3 and 0.4 Å/s for Co and Re, respectively. x-ray diffractograms indicate the structure to be highly textured with the c axis perpendicular to the sample plane. The superlattice structure was obtained from high-angle θ-2θ scans. First-, second-, and third-order satellites are observed on both sides of the central [002] peak. Periodicity and bilayer composition are obtained from comparison of the data with a theoretical calculation of the x-ray diffractogram. Thickness calibration was confirmed by Rutherford backscattering and profilometer data. In-plane magnetization and magnetoresistance data (Δρ/ρ) indicate that stronger antiferromagnetic coupling and highest Δρ/ρ occur for tRe≊6 Å. The saturation field (Hs) needed to align contiguous antiferromagnetically coupled Co layers is about 1 T. This corresponds to an exchange coupling between the Co layer J≊−1 erg/cm2. (Δρ/ρ) reaches 2% in samples deposited at 170 °C. This data confirms results obtained by Parkin et al.1 in Co-Ru and Co-Cr superlattices." @default.
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- W2073380532 date "1991-11-15" @default.
- W2073380532 modified "2023-09-26" @default.
- W2073380532 title "Antiferromagnetic coupling and magnetoresistance enhancement in Co-Re metallic superlattices (abstract)" @default.
- W2073380532 cites W2095313982 @default.
- W2073380532 doi "https://doi.org/10.1063/1.350116" @default.
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