Ultra-Sensitive Magnetic Sensors Don't Need Ultra Cold

New SQUID arrays take advantage of strength in numbers

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Ultra-Sensitive Magnetic Sensors Don't Need Ultra Cold
This image shows a section of a 484-series SQUID array. Each SQUID consists of two Josephson junctions connected in parallel. The Josephson junctions (represented as red crosses) can be seen as 3-micron-wide narrow bridges crossing the bicrystal boundary shown with a dotted line.
Illustration: Boris Chesca / Loughborough University