What is Albert Fert's contribution to physics?
Quantum theory
Giant magnetoresistance
Relativity
String theory
Answer
Giant magnetoresistance (GMR) is a discovery made by Albert Fert and Peter Grünberg. It refers to a significant change in the electrical resistance of a material when exposed to a magnetic field. This discovery has revolutionized the field of spintronics and led to the development of new technologies such as magnetic sensors, hard disk drives, and magnetic random-access memory (MRAM).
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