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Visualization and quantification of inhomogeneous and anisotropic magnetic fields by polarized neutron grating interferometry

Author

Listed:
  • Jacopo Valsecchi

    (Paul Scherrer Institut
    University of Geneva)

  • Ralph P. Harti

    (Paul Scherrer Institut
    University of Geneva)

  • Marc Raventós

    (Paul Scherrer Institut
    University of Geneva)

  • Muriel D. Siegwart

    (Paul Scherrer Institut
    Paul Scherrer Institut)

  • Manuel Morgano

    (Paul Scherrer Institut)

  • Pierre Boillat

    (Paul Scherrer Institut
    Paul Scherrer Institut)

  • Markus Strobl

    (Paul Scherrer Institut
    University of Copenhagen)

  • Patrick Hautle

    (Paul Scherrer Institut)

  • Lothar Holitzner

    (Paul Scherrer Institut)

  • Uwe Filges

    (Paul Scherrer Institut)

  • Wolfgang Treimer

    (University of Applied Sciences)

  • Florian M. Piegsa

    (University of Bern)

  • Christian Grünzweig

    (Paul Scherrer Institut)

Abstract

The intrinsic magnetic moment of a neutron, combined with its charge neutrality, is a unique property which allows the investigation of magnetic phenomena in matter. Here we present how the utilization of a cold polarized neutron beam in neutron grating interferometry enables the visualization and characterization of magnetic properties on a microscopic scale in macroscopic samples. The measured signal originates from the phase shift induced by the magnetic potential. Our method enables the detection of previously inaccessible magnetic field gradients, in the order of T cm−1, extending the probed range by an order of magnitude. We visualize and quantify the phase shift induced by a well-defined square shaped uniaxial magnetic field and validate our experimental findings with theoretical calculations based on Hall probe measurements of the magnetic field distribution. This allows us to further extend our studies to investigations of inhomogeneous and anisotropic magnetic field distribution.

Suggested Citation

  • Jacopo Valsecchi & Ralph P. Harti & Marc Raventós & Muriel D. Siegwart & Manuel Morgano & Pierre Boillat & Markus Strobl & Patrick Hautle & Lothar Holitzner & Uwe Filges & Wolfgang Treimer & Florian M, 2019. "Visualization and quantification of inhomogeneous and anisotropic magnetic fields by polarized neutron grating interferometry," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11590-2
    DOI: 10.1038/s41467-019-11590-2
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