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6CCVD Research

Tunable magnetic field source for magnetic field imaging microscopy

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2022-09-29
JournalUltramicroscopy
AuthorsAndris BērziņŔ, Hugo Grube, Reinis Lazda, Marc A. Hannig, Jānis Å mits
InstitutionsUniversity of New Mexico, University of Latvia
Citations2

Abstract

Section titled ā€œAbstractā€

In this work, we present a novel, compact, power efficient and variable magnetic field source design for magnetic field imaging microscopy. The device is based on a pair of diametrically magnetized permanent magnet cylinders with electro-mechanical rotation control and ferrite flux homogenizers. A Hall probe and NV centers in diamond are used to demonstrate a proof of concept of a proposed magnetic field setup and to characterize the homogeneity of the produced magnetic field on a micrometer scale. Numerical simulation results are compared with experimental results showing good agreement of the distribution of the magnetic field in the setup. As a result, a magnetic field source with a tunable field amplitude in the range from 1 mT to 222 mT is demonstrated, achieving a magnetic field homogeneity of 2 ppm/Ī¼m or 0.5 Ī¼T/Ī¼m at 222 mT in a 25 Ɨ 25 Ī¼m field of view.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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  3. 2019 - Mapping dynamical magnetic responses of ultrathin micron-size superconducting films using nitrogen-vacancy centers in diamond [Crossref]
  4. 2011 - Magnetic field imaging with nitrogen-vacancy ensembles [Crossref]
  5. 2020 - Simultaneous wide-field imaging of phase and magnitude of AC magnetic signal using diamond quantum magnetometry [Crossref]
  6. 2018 - Microwave device characterization using a widefield diamond microscope
  7. 2019 - Diamond magnetic microscopy of malarial hemozoin nanocrystals
  8. 2016 - Estimating the magnetic moment of microscopic magnetic sources from their magnetic field distribution in a layer of nitrogen-vacancy (NV) centres in diamond [Crossref]
  9. 2021 - Imaging topological spin structures using light-polarization and magnetic microscopy [Crossref]
  10. 2019 - Nanomagnetism of magnetoelectric granular thin-film antiferromagnets [Crossref]

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