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Superconducting Josephson structures with high linearity of transformation of magnetic signal into voltage

  • Proceedings of the XIV International Symposium “Nanophysics and Nanoelectronics-2010” (Nizhni Novgorod, Russia, March 15–19, 2010) Metals and Superconductors
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Abstract

Possible approaches to the creation of Josephson superconducting circuits with a high linearity of transformation of a magnetic signal into voltage and a wide dynamic range have been described. Realization of such circuit by the creation of a special spatial inhomogeneity in chains of Josephson junctions and connection of these chains into a differential circuit has been considered. A new method for linearizing the transfer function of a single two-junction superconducting quantum interference device, which is an elementary cell of the chain, by connecting to it an additional loop playing the role of a nonlinear transformer of the magnetic flux has been described. For both approaches, the basic analytical expressions describing the synthesized circuits are presented. The data on numerical calculation and experimental measurements of samples produced on the basis of niobium technology with the critical current density of Josephson junctions of 4.5 kA/cm2 are reported. The approaches developed in the work can serve as a basis for the creation of highly efficient gigahertz superconducting amplifiers for cellular and satellite communications and can be applied for improving the characteristics of SQUID-based devices.

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Authors and Affiliations

  1. Moscow State University, Moscow, 199992, Russia

    I. I. Soloviev, V. K. Kornev, N. V. Klenov & O. A. Mukhanov

Authors
  1. I. I. Soloviev
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  2. V. K. Kornev
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  3. N. V. Klenov
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  4. O. A. Mukhanov
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Correspondence to I. I. Soloviev.

Additional information

Original Russian Text © I.I. Soloviev, V.K. Kornev, N.V. Klenov, O.A. Mukhanov, 2010, published in Fizika Tverdogo Tela, 2010, Vol. 52, No. 11, pp. 2110–2115.

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Soloviev, I.I., Kornev, V.K., Klenov, N.V. et al. Superconducting Josephson structures with high linearity of transformation of magnetic signal into voltage. Phys. Solid State 52, 2252–2258 (2010). https://doi.org/10.1134/S1063783410110065

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  • DOI: https://doi.org/10.1134/S1063783410110065

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