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Created page with "== Introduction == A Superconducting Quantum Interference Device (SQUID) is a highly sensitive magnetometer used to measure extremely subtle magnetic fields, based on superconducting loops containing Josephson Junctions. SQUIDs are incredibly sensitive to changes in magnetic fields, with the ability to detect changes as small as 5 aT (5×10−18 T) with a few days of averaged measurements. Their sensitivity arises from the phenomenon of Quantum..."
