Magnetoresistance is the change in electrical resistance of a material when exposed to a magnetic field. This effect arises from the influence of magnetic fields on charge carrier motion. Different forms of magnetoresistance exist, including giant magnetoresistance and tunneling magnetoresistance. These effects have revolutionized data storage technologies. Magnetoresistance plays a central role in magnetic sensors and read heads for hard drives. It also provides insight into spin-dependent transport and electronic structure. Studying magnetoresistance helps link magnetism with electrical conduction. Advances in magnetoresistance continue to support spintronic applications and magnetic sensing technologies.
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