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

doi:10.1109/lsens.2020.3046632

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

Department of Physics

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

14 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 language	English
Article number	9302697
Journal	IEEE Sensors Letters
Volume	5
Issue number	1
DOIs	https://doi.org/10.1109/lsens.2020.3046632
State	Published - Jan 2021

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Keywords

Sensor phenomena
magnetic sensors
magnetometer
planar Hall effect
ultralow field detection

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10.1109/lsens.2020.3046632

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AU - Grosz, Asaf

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

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