Journal article

A magnetic source imaging camera

  • Dolgovskiy, Vladimir Physics Department, University of Fribourg, Switzerland
  • Fescenko, Ilja Physics Department, University of Fribourg, Switzerland - Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia
  • Sekiguchi, N. Physics Department, University of Fribourg, Switzerland - Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo, Japan
  • Colombo, Simone Physics Department, University of Fribourg, Switzerland
  • Lebedev, Victor Physics Department, University of Fribourg, Switzerland
  • Zhang, J. Physics Department, University of Fribourg, Switzerland - College of Science, Harbin Engineering University, China
  • Weis, Antoine Physics Department, University of Fribourg, Switzerland
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    11.07.2016
Published in:
  • Applied Physics Letters. - 2016, vol. 109, no. 2, p. 023505
English We describe a magnetic source imaging camera (MSIC) allowing a direct dynamic visualization of the two-dimensional spatial distribution of the individual components Bx(x,y), By(x,y) and Bz(x,y) of a magnetic field. The field patterns allow—in principle— a reconstruction of the distribution of sources that produce the field B→ by inverse problem analysis. We compare experimentally recorded point-spread functions, i.e., field patterns produced by point-like magnetic dipoles of different orientations with anticipated field patterns. Currently, the MSIC can resolve fields of ≈10 pT (1 s measurement time) range in a field of view up to ∼20 × 20 mm2. The device has a large range of possible applications. As an example, we demonstrate the MSIC's use for recording the spatially resolved Néel magnetorelaxation of blocked magnetic nanoparticles.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/305189
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