High--Tc RF SQUIDs with Large Inductance of Quantization Loop

Sermyagin, A. V.

doi:10.1016/j.physc.2003.10.009

arXiv 2003-05-02 DOI 10.1016/j.physc.2003.10.009 0 views

High--Tc RF SQUIDs with Large Inductance of Quantization Loop

Sermyagin, A. V.

Superconductivity

Original · EN

Experimental data on signal and noise characteristics of high--Tc RF SQUIDs with large inductance of quantization loop are presented. The SQUIDs were produced by a thick--film HTS--technique of painting on the Y₂BaCuO₅ substrate. For the first time, a steady quantum interference was observed in RF SQUID with the inductance as large as Lₛ=6.6 nH, that is, 60 times higher than the fluctuation inductance LF≃10⁻¹⁰H at the liquid nitrogen temperature T=77 K. A new method is offered to evaluate the sensitivity of RF SQUID with optimum inductance of the quantization loop.

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