Influence of roughness and disorder on tunneling magnetoresistance


Xu, P.X. and Karpan, V.M. and Xia, K. and Zwierzycki, M. and Marushchenko, I. and Kelly, P.J. (2006) Influence of roughness and disorder on tunneling magnetoresistance. Physical Review B: Condensed matter and materials physics, 73 (18). p. 180402. ISSN 1098-0121

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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 magnetoresistance (TMR) predicted for ideal systems.
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Copyright:© 2006 The American Physical Society
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