How is data stored in devices that use giant magnetoresistance?
Optical encoding
Magnetic bits
Electron trapping
Chemical bonding
Answer
Magnetic bits store data in devices that use giant magnetoresistance (GMR). These bits are composed of alternating layers of ferromagnetic and non-ferromagnetic materials, and their resistance changes depending on the relative orientation of the magnetic moments in the ferromagnetic layers. When the moments are aligned, the resistance is low, and when they are anti-aligned, the resistance is high.
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