A magnetic source imaging camera
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Dolgovskiy, Vladimir
Physics Department, University of Fribourg, Switzerland
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Fescenko, Ilja
Physics Department, University of Fribourg, Switzerland - Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia
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Sekiguchi, N.
Physics Department, University of Fribourg, Switzerland - Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo, Japan
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Colombo, Simone
Physics Department, University of Fribourg, Switzerland
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Lebedev, Victor
Physics Department, University of Fribourg, Switzerland
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Zhang, J.
Physics Department, University of Fribourg, Switzerland - College of Science, Harbin Engineering University, China
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Weis, Antoine
Physics Department, University of Fribourg, Switzerland
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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.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Physique
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Language
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Classification
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Physics
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/305189
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