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Phys. Rev. B 48, 6192–6198 (1993)

[Issue 9 – 1 September 1993 ]

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Parallel and perpendicular transport in multilayered structures

Y. Asano, A. Oguri, and S. Maekawa

Department of Applied Physics, Nagoya University, Nagoya 464-01, Japan

The difference between parallel and perpendicular conductance in magnetic superlattices such as Fe/Cr are studied numerically with the Kubo formula and a recursion method. In the calculation, the multilayered structure of superlattices is taken into account through a periodic potential along the direction normal to the interfaces. It is shown that the magnetoresistance for the current parallel to the layers MR_|| is increased by the interface roughness and decreased by the bulk impurity scattering. Since the Brillouin zone is divided into a series of minizones due to the periodic potential, the magnetoresistance for the current perpendicular to the layers MR_perp is determined by the miniband structure and becomes larger than MR_||.

©1993 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v48/p6192
DOI: 10.1103/PhysRevB.48.6192
PACS: 73.50.-h, 75.70.-i, 72.10.-d

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