Referenced Items are not available for this document.
Because of high permittivity of SrTiO/sub 3/ (STO) substrate, YBCO high-Tc SQUIDs have distributed impedance. Based on the simulation by the analytical method to calculate the I-V characteristic, we have designed and fabricated YBCO dc SQUIDs that have a transmission-line-like geometry of thin parallel strips with a wide slit between them. The geometrical parameters were determined to give high modulation voltage. The fabricated SQUIDs had a white noise of (0.5-1.0)/spl times/10 /spl Phi//sub 0//Hz/sup 1/2/. We also designed a direct coupling magnetometer, in which the transmission line SQUID was located within the hole of the pickup coil. On a small substrate area of 5 mm/spl times/10 mm, the fabricated magnetometer had an effective area of 0.22 mm/sup 2/. The field noise of about 100 fT/Hz/sup 1/2/ was obtained in the white noise region.
Published in:
Applied Superconductivity, IEEE Transactions on
(Volume:9
,
Issue:
2
)
Date of Publication: June 1999
- Page(s):
- 3275 - 3278
- ISSN :
- 1051-8223
- INSPEC Accession Number:
- 6356789
- Digital Object Identifier :
- 10.1109/77.783728
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- June 1999
- Sponsored by :
- The IEEE Council on Superconductivity
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