Low-frequency noise of magnetic sensors based on the anomalous hall effect in Fe–Pt alloys

Yiou Zhang; Qiang Hao; Gang Xiao

doi:10.3390/s19163537

Low-frequency noise of magnetic sensors based on the anomalous hall effect in Fe–Pt alloys

Yiou Zhang, Qiang Hao, Gang Xiao

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

22 Scopus citations

Abstract

We took advantage of the large anomalous Hall effect (AHE) in Fe-Pt ferromagnetic alloys and fabricated magnetic sensors for low-frequency applications. We characterized the low-frequency electronic noise and the field detectability of the FexPt100-x system with various thin film thicknesses and Fe concentrations. The noise source consisted of 1/f and Johnson noise. A large current density increased the 1/f noise but not the Johnson noise. We found that the field detectability of the optimized Fe-Pt thin film offers much better low-frequency performance than a highly sensitive commercial semiconductor Hall sensor. Anomalous Hall effect sensors are, therefore, good candidates for magnetic sensing applications.

Original language	English (US)
Pages (from-to)	3537
Journal	Sensors (Switzerland)
Volume	19
Issue number	16
DOIs	https://doi.org/10.3390/s19163537
State	Published - Aug 13 2019
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-10
Acknowledgements: This work was supported by the King Abdullah University of Science and Technology (KAUST) through the Sensor Initiative.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

Biochemistry
Atomic and Molecular Physics, and Optics
Analytical Chemistry
Electrical and Electronic Engineering

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10.3390/s19163537

Cite this

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title = "Low-frequency noise of magnetic sensors based on the anomalous hall effect in Fe–Pt alloys",

abstract = "We took advantage of the large anomalous Hall effect (AHE) in Fe-Pt ferromagnetic alloys and fabricated magnetic sensors for low-frequency applications. We characterized the low-frequency electronic noise and the field detectability of the FexPt100-x system with various thin film thicknesses and Fe concentrations. The noise source consisted of 1/f and Johnson noise. A large current density increased the 1/f noise but not the Johnson noise. We found that the field detectability of the optimized Fe-Pt thin film offers much better low-frequency performance than a highly sensitive commercial semiconductor Hall sensor. Anomalous Hall effect sensors are, therefore, good candidates for magnetic sensing applications.",

author = "Yiou Zhang and Qiang Hao and Gang Xiao",

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AU - Zhang, Yiou

AU - Hao, Qiang

AU - Xiao, Gang

N1 - KAUST Repository Item: Exported on 2022-06-10 Acknowledgements: This work was supported by the King Abdullah University of Science and Technology (KAUST) through the Sensor Initiative. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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Y1 - 2019/8/13

N2 - We took advantage of the large anomalous Hall effect (AHE) in Fe-Pt ferromagnetic alloys and fabricated magnetic sensors for low-frequency applications. We characterized the low-frequency electronic noise and the field detectability of the FexPt100-x system with various thin film thicknesses and Fe concentrations. The noise source consisted of 1/f and Johnson noise. A large current density increased the 1/f noise but not the Johnson noise. We found that the field detectability of the optimized Fe-Pt thin film offers much better low-frequency performance than a highly sensitive commercial semiconductor Hall sensor. Anomalous Hall effect sensors are, therefore, good candidates for magnetic sensing applications.

AB - We took advantage of the large anomalous Hall effect (AHE) in Fe-Pt ferromagnetic alloys and fabricated magnetic sensors for low-frequency applications. We characterized the low-frequency electronic noise and the field detectability of the FexPt100-x system with various thin film thicknesses and Fe concentrations. The noise source consisted of 1/f and Johnson noise. A large current density increased the 1/f noise but not the Johnson noise. We found that the field detectability of the optimized Fe-Pt thin film offers much better low-frequency performance than a highly sensitive commercial semiconductor Hall sensor. Anomalous Hall effect sensors are, therefore, good candidates for magnetic sensing applications.

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Low-frequency noise of magnetic sensors based on the anomalous hall effect in Fe–Pt alloys

Abstract

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ASJC Scopus subject areas

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