Mapping magnetic fields: INAC innovates!

When you place little compasses in a magnetic field, they spontaneously align with the magnetic field. Researchers at INAC developed and patented a local magnetic-field mapping system that leverages this concept. Stated simply, the researchers invented a matrix of flexible micrometric beams made from a nickel-iron alloy etched directly onto a silicon or glass substrate. The beams, or cantilevers, curve when an outside magnetic field is applied. The beams’ deformation can be observed and measured under a microscope to generate an accurate image.

The technique is easy to use, accurate, and sensitive. The system could be a good alternative to other mapping techniques currently used for industrial and research applications.

Contact: bernard.dieny@cea.fr

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