Postdoc: Magnetic imaging with magnetoresistive sensors on microstructured thin films

The postdoc will work in the frame of the CEA internal project called IMAGE (Magnetic imaging on microstructured thin films). Mapping the dynamic magnetic properties (e.g. microwave permeability) of magnetic samples is important for optimizing these materials for applications. The IMAGE project involves developing a setup for mapping dynamic magnetic properties by combining a scanner and giant magnetoresistance magnetic sensors, whose interest lies in their wide frequency detection bandwidth from DC to GHz, adapted to the problem. An initial DC measurement setup has been developed at SPEC. This setup will be adapted to frequency measurements, first in the radiofrequency range, then in the microwave range. 2D microstructured samples will be fabricated by LICP and be characterized by electromagnetic techniques at a global scale. The ultimate aim is to produce magnetic microwave permeability maps (local response) using the setup developed for the samples fabricated by LICP. These never-before-obtained maps will be used to develop and validate models of magnetic materials being developed by LICP for various electromagnetic applications (component noise reduction, antenna performance enhancement, etc.) and design new materials with enhanced performance.