Influence of Roughness and Disorder on Tunneling Magnetoresistance

Abstract

A systematic, quantitative study of the effect of interface roughness and disorder on the magnetoresistance of FeCo$|$vacuum$|$FeCo magnetic tunnel junctions is presented based upon parameter-free electronic structure calculations. Surface roughness is found to have a very strong effect on the spin-polarized transport while that of disorder in the leads (leads consisting of a substitutional alloy) is weaker but still sufficient to suppress the huge tunneling magneto-resistance (TMR) predicted for ideal systems.

References in corpus (5)

• How to calculate the degree of spin polarization in ferromagnets?
• Effect of interface states on spin-dependent tunneling in Fe/MgO/Fe tunnel junctions
• First-principles scattering matrices for spin-transport
• Interface resistance of disordered magnetic multilayers
• Effect of interface bonding on spin-dependent tunneling from the oxidized Co surface

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