Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
64 (1994), S. 366-368
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Epitaxial thin-film YBa2Cu3O7 flux transformers with multiturn input coils have been constructed on 1 cm2 MgO substrates using PrBa2Cu3O7 as an insulator. By coupling these to high-temperature superconducting quantum interference devices (SQUIDs) using a flip-chip technology, several low-noise magnetometers and a gradiometer have been constructed. The yield of fully working flux transformers on 1 cm2 substrates exceeds 80%, and field sensitivities at 77 K of (520±30)fT/(square root of)Hz at 1 Hz and (165±8)fT/(square root of)Hz above 10 Hz have been achieved. No evidence for excess low-frequency noise above that of the uncoupled SQUID has been found in the flip-chip magnetometers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.111149
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