Magnetic field sensor for the detection of at least two magnetic field components

A magnetic field sensor for detection of at least two magnetic field components comprising:

• a first sensor for the detection of a first magnetic component according to a first direction X comprising:
• a first flux concentrator comprising a first magnetic part, a second magnetic part and an air gap between the first and second magnetic parts;
• a first magnetoresistive element arranged in the air gap of the first flux concentrator,
• a second sensor for the detection of a second magnetic component according to a second direction Y that is different from the first direction X comprising:
• a second flux concentrator comprising a first magnetic part, a second magnetic part and an air gap between the first and second magnetic parts;
• a second magnetoresistive element arranged in the air gap of the second flux concentrator;
• each one of the first and second magnetoresistive elements comprising a reference layer having a fixed magnetisation direction and a sensitive layer having a variable magnetisation direction, with each of the first and second magnetoresistive elements having a first state of rest wherein the magnetisation of the sensitive layer has a given first direction, and a second excited state wherein the magnetisation of the sensitive layer has a second direction that is different from the first direction;
• wherein
• the fixed magnetisation direction of the reference layer of the first magnetoresistive element is substantially identical to the fixed magnetisation direction of the reference layer of the second magnetoresistive element;
• when the first and second magnetoresistive elements are in the first state of rest, the variable magnetisation direction of the sensitive layer of the first magnetoresistive element is substantially identical to the variable magnetisation direction of the sensitive layer of the second magnetoresistive element;
• the air gap of the first flux concentrator and the air gap of the second flux concentrator are oriented parallel to a direction XY which is, at ±15°, a bisector of the first direction X and of the second direction Y;
• the first magnetoresistive element comprises a first antiferromagnetic layer for the trapping of the fixed magnetisation direction of the reference layer of the first magnetoresistive element, the second magnetoresistive element comprises a second antiferromagnetic layer for the trapping of the fixed magnetisation direction of the reference layer of the second magnetoresistive element, and the first antiferromagnetic layer and the second antiferromagnetic layer have a same blocking temperature.