Magnetotransport through magnetic domain patterns in permalloy rectangles

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Erscheinungsjahr:
2005
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Text
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  • We study the influence of multidomain configurations on the magnetoresistance of rectangular permalloy microstructures with various thicknesses. The anisotropic magnetoresistance (AMR) is the dominating resistance contribution in these systems. Reversible and irreversible magnetization reversals lead to complex AMR signals. Appropriate positioning of the voltage probes allows the local detection of the magnetoresistance. Two methods for calculating the local AMR, the uniform-current model and diffusive transport calculations, are described. The latter takes potential differences and inhomogenous current paths into account. By comparing magnetoresistance measurements, micromagnetic simulations, and images of magnetic-force microscopy for various film thicknesses, we can exactly link the transitions between magnetic configurations to changes observed in the magnetoresistance. © 2005 The American Physical Society.
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  • info:eu-repo/semantics/closedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/b2a016ee-7c7f-4cfb-82df-64ef9925c112