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Applied Physics Letters
Volumn 41, Issue 2, 1982, Pages 197-199
Superconducting quantum interference device with very low magnetic flux noise energy
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EID: 2642614579     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.93460     Document Type: Article
Times cited : (55)
References (8)
  • 6
    • 0005060576 scopus 로고
    • has argued that the minimum noise energy is 2ℏ for a SQUID used as an amplifier. Since the present measurements are on a SQUID without an input circuit, this result does not apply.
    • (1981) Appl. Phys. Lett , vol.38 , pp. 182
    • Voss, R.F.1
  • 7
    • 84951159256 scopus 로고
    • A preliminary account of this work was given at the 16th International Conference on Low Temperature Physics
    • (1981) Physica , vol.108BC , pp. 1083
  • 8
    • 84951051792 scopus 로고    scopus 로고
    • The SQUID inductance L was estimated in two ways. In the first, we measured the mutual inductance with respect to a current along the counter electrode, and assumed this value to be [formula omitted] In the second, we measured the maximum and minimum critical currents, and estimated β from Fig. 4 of Ref. 2. The two methods agreed to within 4% and 7% for SQUID’S A and B. We have used the first method to obtain the values quoted in the tables. We did not measure C and R directly, and the errors in the quoted values may be as high as [formula omitted]

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