What is the main technological impact of Albert Fert's discovery?
Quantum computing
Hard disk drives
Solar energy
Telecommunications
Answer
Hard disk drives are the main technological impact of Albert Fert's discovery of giant magnetoresistance (GMR). GMR is a property of certain materials that exhibit a large change in electrical resistance when exposed to a magnetic field. This discovery led to the development of GMR sensors, which are used in hard disk drives to read and write data.
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