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Scanning Magnetic Microscope Using a Gradiometric Configuration for Characterization of Rock Samples.

Jefferson F D F Araujo1, Andre L A Reis2, Angela A P Correa3

  • 1Department of Physics, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22451-900, Brazil.

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|December 15, 2019
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Summary
This summary is machine-generated.

This study introduces a new spatial domain technique for magnetic microscopy data processing. The method estimates magnetic moment distribution, offering detailed insights into sample magnetization without requiring cryogenic temperatures.

Keywords:
equivalent-layer techniquegeological samplemagnetic measurementsscanning magnetic microscopy

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Area of Science:

  • Geophysics
  • Materials Science
  • Analytical Chemistry

Background:

  • Scanning magnetic microscopy offers high spatial resolution and field sensitivity for magnetic field mapping.
  • Unlike other methods, it operates without cryogenic technology, reducing cost and complexity.
  • Accurate processing of magnetic microscopy data is crucial for detailed sample analysis.

Purpose of the Study:

  • To present a novel spatial domain technique for processing magnetic microscopy data.
  • To estimate magnetic moment distribution using an equivalent layer approach.
  • To enable detailed magnetic interpretation of samples with high spatial variability.

Main Methods:

  • Developed a spatial domain technique based on an equivalent layer approach.
  • Formulated a linear inverse problem to calculate magnetic vector and amplitude.
  • Applied the method to process data from magnetic microscopy.

Main Results:

  • The technique effectively estimates magnetic moment distribution over a fictitious dipole layer.
  • Generated vector field maps provide comprehensive information on magnetic carrier distribution.
  • The approach allows for characterization of isolated areas and bulk samples at micro/millimeter scales.

Conclusions:

  • The presented technique enhances magnetic microscopy data analysis.
  • It provides valuable insights into spatial magnetization distribution, particularly for samples with high variability.
  • This method is applicable to various fields, including rock magnetism, requiring room-temperature mapping.