Planar Hall Effect Magnetometer with 5 pT Resolution

Hariharan Nhalil, Tzahi Givon, Proloy Taran Das, Nir Hasidim, Vladislav Mor, Moty Schultz, Shai Amrusi, Lior Klein, Asaf Grosz

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We integrate elliptical planar Hall effect (PHE) magnetometers with optimized high permeability magnetic flux concentrators. The integrated magnetometers exhibit at room temperature an equivalent magnetic noise of ∼5 pT/√Hz at 10 Hz, 7.4 pT/√Hz at 1 Hz, and better than 100 pT/√Hz at 10 mHz. The results constitute more than an order of magnitude improvement over previously reported state-of-the-art PHE magnetometers, and demonstrate, for the first time, the ability of a magnetoresistive sensor to match the performance of state-of-the-art, high-end flux-gate, and miniature atomic magnetometers.

Original languageEnglish
Article number8871164
JournalIEEE Sensors Letters
Volume3
Issue number12
DOIs
StatePublished - 1 Dec 2019

Keywords

  • Magnetic sensors
  • equivalent magnetic noise (EMN)
  • magnetometer
  • planar Hall effect (PHE)

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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