Magnetic Sensors: Magnetoresistance

This lecture introduces the magnetoresistance sensor, a semiconductor-based sensor that differs from the MR sensor. The sensor's operation is based on the Lorentz force, affecting electron trajectories and resistance. Various applications in automotive, computer, medical, and industrial fields are discussed, highlighting the sensor's role in measuring mechanical quantities using magnetic principles. The lecture also covers the construction and operation of GMR and MR sensors, emphasizing their ability to detect different orientations. Additionally, the integration of GMR sensors in read heads for data storage is explained, showcasing how the sensor's design allows for precise writing and reading of information on magnetic disks.