SQUIDs - Low Temperature Laboratory
SQUIDs - Low Temperature Laboratory
SQUIDs - Low Temperature Laboratory
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The dc Superconducting Quantum Interference Device<br />
• dc SQUID<br />
Ib<br />
Two Josephson junctions on a superconducting ring<br />
I<br />
• Current-voltage (I-V) characteristic modulated by magnetic flux Φ:<br />
Period one flux quantum Φ o = h/2e = 2 x 10 -15 T m 2<br />
I<br />
nΦ o<br />
(n+1/2)Φ o<br />
∆V<br />
V<br />
δV<br />
V<br />
δΦ<br />
V<br />
0 1 2<br />
Φ<br />
Φo
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