Influence of Roughness and Disorder on Tunneling Magnetoresistance

Details Influence of Roughness and Disorder on Tunneling Magnetoresistance Influence of Roughness and Disorder on Tunneling Magnetoresistance

2006-01-13

arxiv.org/abs/cond-mat/0601291v2

Phys. Rev. B 73, 180402(R) (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.73.180402

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.

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