Magnetic mapping using magnetoresistive magnetic sensors.

Full description

This internship is part of the ANR MOOSAIC project, which aims to address the problem of non-destructive evaluation of the local magnetic properties (DC and AC) of microstructured and inhomogeneous materials (e.g. paleomagnetic rocks and radiofrequency (RF)-absorbing petals). It tackles this problem by developing a 3D scanner, consisting of 4 giant magnetoresistance (GMR) sensors, capable of measuring stray magnetic fields emitted by material surfaces in both DC and AC modes, rapidly, vectorially and quantitatively over large areas (several mm²) with a spatial resolution of ten microns. The aim is to optimize the setup for determining DC and AC magnetic properties, to design a model for reconstructing the field and magnetic properties of the sample, and to apply it to two case studies in geology and physics.

The aim of the internship will be to optimize the GMR sensors and 3D probes used to carry out the magnetic mapping, in terms of leakage field reduction, accuracy of sensor positioning on the probe, stability under temperature and field disturbances, AC measurements, scan height control and determination of the 3D probe sensitivity matrix. GMR deposition and cleanroom fabrication, characterization and optimization by magnetometry, magnetotransport and noise measurements, and 3D probe assembly will be carried out during the internship.

Location

CEA Saclay, (91) Essonne, France

Internship conditions

• Internship duration: 6 months
• Level of study: Bac+4/5
• Training: Ingenieur/Master
• Continuation in PhD thesis: Yes
• Application deadline: 3 février 2025

Supervisor

Aurélie Solignac
Phone: 0169089540
Email :