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Towards Compact Three-dimensional Magnetoelectronics—Magnetoresistance In Rolled-up Co/Cu Nanomembranes

C. Müller, C. B. Bufon, M. E. N. Fuentes, D. Makarov, D. H. Mosca, O. Schmidt
Published 2012 · Physics

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Strain engineering combined with standard top-down techniques is shown to be eligible to fabricate compact three dimensional architectures based on rolled-up Co/Cu nanomembranes. The fabrication process is fully integrative and provides rolled-up tubes of high quality and yield (∼95%). Rolled-up tubes with two windings show magnetoresistances (MR) ∼20% higher than those observed in thin films. The enhancement of magnetoresistance is most likely due to the coupling between neighboring windings, variations of the Cu layer thickness, and increased effective area crossed by current lines in the film plane. Present results inhere new potential for magnetic sensing and electronic components.
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