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 journalArticlepeer-review

12 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 languageEnglish (US)
Pages (from-to)3537
JournalSensors (Switzerland)
Volume19
Issue number16
DOIs
StatePublished - Aug 13 2019
Externally publishedYes

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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