Commissariat À L'énergie Atomique Et Aux Énergies Alternatives

Allegro Microsystems, LLC

Crocus-technology Sa

Salim Dounia

Bernard Dieny

Andrey Timopheev

Nikita Strelkov

Claire Baraduc

A magnetic sensor device comprising a plurality of magnetic sensor elements; each magnetic sensor element including a magnetic tunnel junction including a reference layer having a reference magnetization, a sense layer having a sense magnetization and a tunnel barrier layer; the sense magnetization comprising a stable vortex configuration in the absence of an external magnetic field, the vortex having a core reversibly movable in a plane (P) of the sense layer according to an external magnetic field; the sense layer including a peripheral shape in the plane (P), the peripheral shape including an asymmetric edge portion; the magnetic sensor elements being arranged such that the edge portion of a magnetic sensor element is opposite to the edge portion of the adjacent magnetic sensor element.

Magnetic sensor device having an improved measurement range

Magnetic element including a first ferromagnetic layer having a first magnetization including a stable magnetization vortex configuration having a vortex core. The first ferromagnetic layer includes an indentation configured such that the vortex core nucleates substantially at the indentation. Upon application of an external magnetic field in a first field direction, the vortex core moves along a first path and the first magnetization rotates around the vortex core in a counterclockwise direction. Upon application of the external magnetic field in a second field direction opposed to the first field direction, the vortex core moves along a second path and the first magnetization rotates around the vortex core in a clockwise direction. Both the first and second field path are substantially identical and move the vortex core away from the indentation.

Magnetic element having an improved measurement range

Growing community of inventors

Grenoble, France

Salim Dounia