Low-frequency flux noise and visualization of vortices in a YBa{sub 2}Cu{sub 3}O{sub 7} dc superconducting quantum interference device washer with an integrated input coil
We used low-temperature scanning electron microscopy (LTSEM) for imaging quantized magnetic flux (vortices) in dc superconducting quantum interference devices (SQUIDs) with approximately 1{mu}m spatial resolution at temperature T=77K in a controllable magnetic field up to 20{mu}T. We demonstrate that LTSEM allows to image the spatial distribution of vortices in a YBa{sub 2}Cu{sub 3}O{sub 7}/SrTiO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7} multilayer thin-film structure consisting of a dc SQUID washer with an integrated input coil on top. Simultaneously, we are able to measure the low-frequency noise of the sample under test, which allows to correlate the spatial distribution of vortices with low-frequency noise in the SQUID. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40203180
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 23 Vol. 78; ISSN 0003-6951
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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