Influence of roughness and disorder on tunneling magnetoresistance

P.X. Xu; V. Karpan; K. Xia; M. Zwierzycki; I. Marushchenko; P.J. Kelly

doi:10.1103/PhysRevB.73.180402

Influence of roughness and disorder on tunneling magnetoresistance

P.X. Xu, V. Karpan, K. Xia, M. Zwierzycki, I. Marushchenko, P.J. Kelly

Research output: Contribution to journal › Article › Academic › peer-review

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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.

Original language	English
Article number	180402
Number of pages	4
Journal	Physical review B: Condensed matter and materials physics
Volume	73
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.73.180402
Publication status	Published - 2006

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10.1103/PhysRevB.73.180402

Cite this

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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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AU - Karpan, V.

AU - Xia, K.

AU - Zwierzycki, M.

AU - Marushchenko, I.

AU - Kelly, P.J.

PY - 2006

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AB - 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.

U2 - 10.1103/PhysRevB.73.180402

DO - 10.1103/PhysRevB.73.180402

M3 - Article

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VL - 73

JO - Physical review B: Condensed matter and materials physics

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