Related Experiment Video
Updated: Jun 21, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
Published on: June 9, 2016
Planar Hall Effect Magnetic Sensors with Extended Field Range
Daniel Lahav1, Moty Schultz1, Shai Amrusi2
1Department of Physics, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel.
Researchers enhanced elliptical planar Hall effect (EPHE) sensors to operate in larger magnetic fields while maintaining low noise. This expansion broadens their application potential in sensitive magnetic field detection.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Electrical Engineering
Background:
- Elliptical planar Hall effect (EPHE) sensors offer excellent equivalent magnetic noise (EMN) performance (pT/Hz).
- Current EPHE sensors are limited to sub-milliTesla (mT) magnetic field ranges, restricting their practical applications.
- Expanding the operational magnetic field range is crucial for wider sensor deployment.
Purpose of the Study:
- To fabricate and characterize EPHE sensors with an enhanced magnetic field operating range.
- To investigate the relationship between magnetic anisotropy and EMN in EPHE sensors.
- To assess the potential of these enhanced sensors for various applications.
Main Methods:
- Fabrication of EPHE sensors with tailored uniaxial shape-induced anisotropy.
- Measurement of equivalent magnetic noise (EMN) at 10 Hz across varying magnetic anisotropy (12 Oe to 120 Oe).
- Characterization of sensor behavior, including hysteresis and magnetic domain characteristics.
Main Results:
- EPHE sensors were successfully fabricated with magnetic anisotropy ranging from 12 Oe to 120 Oe.
- EMN at 10 Hz varied from 800 pT/Hz to 56 nT/Hz with increasing anisotropy.
- The sensors demonstrated single magnetic domain behavior with negligible hysteresis.
Conclusions:
- Increasing uniaxial shape-induced anisotropy effectively extends the operational magnetic field range of EPHE sensors.
- EPHE sensors with enhanced field ranges show promise for applications requiring sensitive detection across a wider magnetic field spectrum.
- These findings pave the way for developing more versatile magnetic sensors.
More Related Videos
10:36Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
06:17Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
Published on: January 16, 2020
Related Concept Videos
The Hall Effect
Ferromagnetism
Magnetic Field of a Solenoid
Consider a solenoid with 100 turns wrapped around a cylinder of...
Magnetic Field Of A Current Loop
Magnetic Field Due to Two Straight Wires
Magnetic Field Due To A Thin Straight Wire