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- W2001873703 abstract "The temperature dependence of the resistivity of three sputtered Fe/Cr superlattices was analyzed. Two are antiferromagnetic and one is ferromagnetic. Also, a series of Fe/Cr superlattices was characterized as a function of Cr thickness by means of resistivity, Kerr-rotation, and x-ray-diffraction measurements. Magnetoresistance measurements for films with 32-AA{} Fe layers confirm the presence of three oscillations with peaks at ensuremath{sim}11, 27, and 42 AA{} Cr. The Kerr-rotation measurements for fixed Fe thicknesses of 15, 25, 32 and 40 AA{} indicate that the first antiferromagnetic region is always between ensuremath{sim}6 and 17 AA{} Cr thickness. The low-angle x-ray results show that the structure is not ideal, based on comparison to dynamical simulation or to the quality of similarly prepared Fe/Mo superlattices. The magnetoresistivity of the antiferromagnetic films decays from its maximum value at low temperature with a ${mathit{T}}^{2}$ behavior below ensuremath{sim}100 K, while a ferromagnetic film could be similarly approximated by a ${mathit{T}}^{3/2}$ behavior. These power laws are a consequence of the thermal excitation of magnons in these anisotropic antiferromagnetic and ferromagnetic superlattices, respectively. The resistivities due to sd-interband scattering ${mathrm{ensuremath{rho}}}_{mathit{s}mathit{d}}$ are approximated by a ${mathit{T}}^{2}$ behavior and roughly a ${mathit{T}}^{3}$ behavior, respectively. This indicates that for the antiferromagnetic films the dominant contributions to ${mathrm{ensuremath{rho}}}_{mathit{s}mathit{d}}$ come from processes mediated by magnons as well as phonons." @default.
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- W2001873703 date "1991-11-01" @default.
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- W2001873703 title "Temperature dependence of the magnetoresistance of sputtered Fe/Cr superlattices" @default.
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- W2001873703 doi "https://doi.org/10.1103/physrevb.44.9378" @default.
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