Probing Magnetic Configurations in Co/Cu Multilayered Nanowires

Details Probing Magnetic Configurations in Co/Cu Multilayered Nanowires Probing Magnetic Configurations in Co/Cu Multilayered Nanowires

2009-01-18

arxiv.org/abs/0901.2745v1

Applied Physics Letters, 94, 032504 (2009).

Physics

Condensed Matter

Materials Science

14 pages, 3 figures

Scientific paper

10.1063/1.3073740

Magnetic configurations in heterostructures are often difficult to probe when the magnetic entities are buried inside. In this study we have captured magnetic and magnetoresistance "fingerprints" of Co nanodiscs embedded in Co/Cu multilayered nanowires using a first-order reversal curve method. In 200nm diameter nanowires, the magnetic configurations can be tuned by adjusting the Co nanodisc aspect ratio. Nanowires with the thinnest Co nanodiscs exhibit single domain behavior, while those with thicker Co reverse via vortex states. A superposition of giant and anisotropic magnetoresistance is observed, which corresponds to the different magnetic configurations of the Co nanodiscs.

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