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 et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 277734
- DOI 10.1063/1.4958700
- Persistent URL
- https://folia.unifr.ch/unifr/documents/305189
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