Magnetoresistive sensors are devices that detect changes in magnetic fields by measuring variations in electrical resistance. They utilize the magnetoresistance effect, where the resistance of a material changes when exposed to a magnetic field. These sensors are commonly used in applications such as automotive systems, data storage, and industrial automation. These sensors can be classified into different types, including giant magnetoresistive (GMR) and tunneling magnetoresistive (TMR) sensors. Their high sensitivity and ability to operate in various environments make them valuable for precise measurements in navigation, position sensing, and magnetic field mapping.