Anomalous magnetoresistance of magnetic multlilayers.

Seviour, R. and Sanvito, S. and Lambert, C. J. and Jefferson, J. H. (2000) Anomalous magnetoresistance of magnetic multlilayers. Journal of Physics: Condensed Matter, 12. L621-L626. ISSN 1361-648X

Abstract

We examine transport properties of a magnetic superlattice with current perpendicular to the planes. In the limit that the phase-breaking and spin flip scattering lengths are greater than the system size, a multiple-scattering approach is used to calculate the 4-probe conductance. We show that by tuning the strength of tunnelling barriers placed between the current and voltage probes magnetoresistance ratios of arbitrary strength and sign are achievable.