Signal Asymmetries in the Anomalous Hall Effect of Bilayer Magnetic Nanostructures

Rhys Griffiths; Paul Nutter; A. Neumann; C.  Thönnißen; E.-S.  Wilhelm; Thomas Thomson

doi:10.1063/1.4963231

Signal Asymmetries in the Anomalous Hall Effect of Bilayer Magnetic Nanostructures

Rhys Griffiths, Paul Nutter, A. Neumann, C. Thönnißen , E.-S. Wilhelm , Thomas Thomson

University of Hamburg

Research output: Contribution to journal › Article › peer-review

Abstract

We propose an interpretation for the signal asymmetry observed in anomalous Hall effect (AHE) transport measurements of magnetic nanostructures patterned from bilayer magnetic thin films. Experimental data and simulations demonstrate that the signal asymmetry observed in hysteresis loops arises due to a combination of the anomalous Hall effect together with a contribution from longitudinal giant magnetoresistance (GMR). The effect shows a high-sensitivity to nanoscale misalignments in Hall cross geometry. Consequently, the complex nature of the origin of electrical signals should be taken into account when undertaking any transport measurements on magnetic bilayer nanostructures, such as GMR or spintronic devices.

Original language	English
Article number	132401
Journal	Applied Physics Letters
Volume	109
Issue number	13
Early online date	26 Sept 2016
DOIs	https://doi.org/10.1063/1.4963231
Publication status	Published - 26 Sept 2016

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10.1063/1.4963231Licence: CC BY

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title = "Signal Asymmetries in the Anomalous Hall Effect of Bilayer Magnetic Nanostructures",

abstract = "We propose an interpretation for the signal asymmetry observed in anomalous Hall effect (AHE) transport measurements of magnetic nanostructures patterned from bilayer magnetic thin films. Experimental data and simulations demonstrate that the signal asymmetry observed in hysteresis loops arises due to a combination of the anomalous Hall effect together with a contribution from longitudinal giant magnetoresistance (GMR). The effect shows a high-sensitivity to nanoscale misalignments in Hall cross geometry. Consequently, the complex nature of the origin of electrical signals should be taken into account when undertaking any transport measurements on magnetic bilayer nanostructures, such as GMR or spintronic devices. ",

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AU - Nutter, Paul

AU - Neumann, A.

AU - Thönnißen , C.

AU - Wilhelm , E.-S.

AU - Thomson, Thomas

PY - 2016/9/26

Y1 - 2016/9/26

N2 - We propose an interpretation for the signal asymmetry observed in anomalous Hall effect (AHE) transport measurements of magnetic nanostructures patterned from bilayer magnetic thin films. Experimental data and simulations demonstrate that the signal asymmetry observed in hysteresis loops arises due to a combination of the anomalous Hall effect together with a contribution from longitudinal giant magnetoresistance (GMR). The effect shows a high-sensitivity to nanoscale misalignments in Hall cross geometry. Consequently, the complex nature of the origin of electrical signals should be taken into account when undertaking any transport measurements on magnetic bilayer nanostructures, such as GMR or spintronic devices.

AB - We propose an interpretation for the signal asymmetry observed in anomalous Hall effect (AHE) transport measurements of magnetic nanostructures patterned from bilayer magnetic thin films. Experimental data and simulations demonstrate that the signal asymmetry observed in hysteresis loops arises due to a combination of the anomalous Hall effect together with a contribution from longitudinal giant magnetoresistance (GMR). The effect shows a high-sensitivity to nanoscale misalignments in Hall cross geometry. Consequently, the complex nature of the origin of electrical signals should be taken into account when undertaking any transport measurements on magnetic bilayer nanostructures, such as GMR or spintronic devices.

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JO - Applied Physics Letters

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Signal Asymmetries in the Anomalous Hall Effect of Bilayer Magnetic Nanostructures

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