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

18 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

ASJC Scopus subject areas

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

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