Supercurrent decay in nano-superconducting quantum interference devices for intrinsic magnetic flux resolution (Articolo in rivista)

Type
Label
  • Supercurrent decay in nano-superconducting quantum interference devices for intrinsic magnetic flux resolution (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.3078519 (literal)
Alternative label
  • Granata C., Vettoliere A., Russo R., Esposito E., Russo M., and Ruggiero B. (2009)
    Supercurrent decay in nano-superconducting quantum interference devices for intrinsic magnetic flux resolution
    in Applied physics letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Granata C., Vettoliere A., Russo R., Esposito E., Russo M., and Ruggiero B. (literal)
Pagina inizio
  • 062503 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 94 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Cibernetica \"E. Caianiello\" del Consiglio Nazionale delle Ricerche, Pozzuoli, Napoli I-80078, Italy (literal)
Titolo
  • Supercurrent decay in nano-superconducting quantum interference devices for intrinsic magnetic flux resolution (literal)
Abstract
  • Supercurrent decay measurements of nano-superconducting quantum interference devices ?SQUIDs? based on niobium constrictions ?Dayem bridges? are reported. Such measurements provide useful information for applications that employ the SQUID as a trigger where the sensor works on the zero voltage state. The nanodevice consists of a niobium thin film ?30 nm thick? ring with a hole side length of 200 nm including two Dayem bridges of 120?200 nm2. The measurements of the switching current distribution from the zero voltage state and the related escape rate, as function of the bias current, have been performed by a low noise fly time technique. The experimental data have shown an intrinsic current fluctuation less than 0.2% of the critical current at liquid helium temperature, corresponding to an intrinsic sensor magnetic flux resolution of a few m?0. The theoretical predictions based on the thermal escape process theory in the moderately damping limit are in a reasonable agreement with the experimental data. (literal)
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