II. Applications of the Josephson Effect

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R. Gross, A. Marx, and F. Deppe © Walther-Meißner-Institut (2001 - 2013) 4.5.3 SQUID Microscopy AS-Chap. 4 - 67 image magnetic field distribution, high sensitivity, modest spatial resolution - initially: low-T c dc SQUIDs, now: high-T c SQUIDs @ 77 K - frequency: dc up to 1 GHz spatial resolution: - cold samples: 5 ¹m (with soft magnetic focusing tip: 0.1 ¹m) - RT-samples: 30 – 50 ¹m applications. - diagnostics of SC devices - properties of ultra-thin magnetic films - analysis of semiconducting devices SQUID – sample separation: 75 ¹m Sapphire window: 150 ¹m 3 ¹m Si x N y window: 15 ¹m
R. Gross, A. Marx, and F. Deppe © Walther-Meißner-Institut (2001 - 2013) 4.5.3 SQUID Microscopy AS-Chap. 4 - 68 alignment track of 5.25” floppy disk magnetic ink in 1 $ note flux quanta trapped in SQUID washer
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II. Applications of the Josephson Effect

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