Detection of Low-Frequency Magnetic Fields down to Sub-pT Resolution with Planar-Hall Effect Sensors

Proloy Taran Das, Hariharan Nhalil, Moty Schultz, Shai Amrusi, Asaf Grosz, Lior Klein

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Using planar Hall effect sensors with magnetic flux concentrators, we measure magnetic fields at frequencies below 100 Hz. We show that for a measurement time of up to 100 s, it is possible to detect fields of ∼700 fT and ∼1 pT at 10 Hz and 0.1 Hz, respectively. In addition, we measure the linearity and hysteresis of the sensor for fields ≤2.6 μT. These features, combined with the sensor miniature size, low power consumption, and potential low cost, may pave the way for usage in a wide range of applications.

Original languageEnglish
Article number9302697
JournalIEEE Sensors Letters
Volume5
Issue number1
DOIs
StatePublished - 1 Jan 2021

Keywords

  • Sensor phenomena
  • magnetic sensors
  • magnetometer
  • planar Hall effect
  • ultralow field detection

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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