Measuring extremely faint magnetic fields with a minuscule instrument – Tech Explorist

Superconducting quantum interference devices or SQUIDs are widely used to measure very small magnetic fields. They are also used to monitor brain or heart activity. Along with that, earth sciences scientists used SQUIDs to characterize rocks’ composition or detect groundwater flows.
A typical SQUID comprises of a superconducting ring hindered at two points by an extremely thin film with normal conducting or insulating properties. These points, known as weak links, must be so thin that the elect…

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