II. Applications of the Josephson Effect
II. Applications of the Josephson Effect
II. Applications of the Josephson Effect
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
R. Gross, A. Marx, and F. Deppe © Wal<strong>the</strong>r-Meißner-Institut (2001 - 2013)<br />
4.5.3 SQUID Microscopy<br />
AS-Chap. 4 - 67<br />
image magnetic field distribution, high sensitivity, modest spatial resolution<br />
- initially: low-T c dc SQUIDs, now: high-T c SQUIDs @ 77 K<br />
- frequency: dc up to 1 GHz<br />
spatial resolution:<br />
- cold samples: 5 ¹m (with s<strong>of</strong>t magnetic focusing tip: 0.1 ¹m)<br />
- RT-samples: 30 – 50 ¹m<br />
applications.<br />
- diagnostics <strong>of</strong> SC devices<br />
- properties <strong>of</strong> ultra-thin magnetic films<br />
- analysis <strong>of</strong> semiconducting devices<br />
SQUID – sample separation:<br />
75 ¹m Sapphire window: 150 ¹m<br />
3 ¹m Si x N y window: 15 ¹m
Change language