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3D Magnetic Field Reconstruction Methodology Based on a Scanning Magnetoresistive Probe
Filipe Richheimer1,2, Margaret Costa3, Diana C Leitao4,5
1INESC-Microsistemas e Nanotecnologias (INESC-MN), 1000-029 Lisboa, Portugal. f.richheimer@surrey.ac.uk.
Sensors (Basel, Switzerland)
|June 30, 2018
Summary
This study details quantitative 3D magnetic field reconstruction using scanning magnetoresistance microscopy. The method accurately reconstructs magnetic field components of nanoscale ferromagnetic elements.
Area of Science:
- Physics
- Materials Science
- Nanotechnology
Background:
- Accurate characterization of magnetic fields at the nanoscale is crucial for understanding magnetic phenomena.
- Scanning magnetoresistance microscopy (SMM) offers a promising approach for high-resolution magnetic field mapping.
Purpose of the Study:
- To present a quantitative 3D magnetic field reconstruction method using SMM.
- To demonstrate the capability of reconstructing magnetic field components of nanoscale ferromagnetic elements.
Main Methods:
- Utilized a scanning magnetoresistance microscopy setup with a 19.5 μm × 2.5 μm magnetoresistive sensor.
- Employed a rotation stage to measure ferromagnetic Cobalt-Iron (CoFe) elements along different sensor axes.
- Applied analytical coordinate transform equations and numerical simulations based on a field averaging model for reconstruction.
Main Results:
- Achieved detailed in-plane magnetic component reconstruction of 11 nm thick CoFe elements.
- Demonstrated the ability to reconstruct features at the sub-micrometer level.
- Validated reconstruction steps through numerical simulations accounting for sensor volume.
Conclusions:
- The developed SMM-based method enables quantitative 3D magnetic field reconstruction with high resolution.
- The technique is capable of characterizing nanoscale magnetic structures and phenomena.
- Further discussion on factors limiting optimal resolution is provided.
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