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Finite-size Effects In The Conductance And Giant Magnetoresistance Of Fe/Cr And Co/Cu Nanowires

J. Velev, Y. Chang
Published 2003 · Physics

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We present theoretical studies of the size dependence of the current perpendicular-to-the-plane ballistic conductance and giant magnetoresistance (GMR) in Fe/Cr and Co/Cu nanowires within a realistic tight-binding model. Symmetry properties of the nanowire with respect to transformations of the point group C 4 v are exploited to decompose the problem into several independent parts. This allows us to study mesoscopic-size nanowires which are experimentally achievable, Our calculations predict substantial reduction in GMR due to the finite size of the nanowire.
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