Publication Date:
2016-07-13
Description:
We describe a magnetic source imaging camera (MSIC) allowing a direct dynamic visualization of the two-dimensional spatial distribution of the individual components B x ( x , y ) , B y ( x , y ) and B z ( 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 mm 2 . 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.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics
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