Abstract

Superconducting nanoconstrictions have been fabricated from narrow microstrips of Nb deposited by ultra- high vacuum DC sputtering. The thickness of the nanoconstriction has been defined with two different techniques, Ga+ Focused Ion Beam sculpting and Ar+ sputter etching, producing devices that behave as Josephson junctions. A detailed morphological and electrical characterization of the nanoconstrictions has been performed to compare the results obtained with the two techniques. The effect of the electrochemical anodization process used to passivate the film surface and the temperature dependence of critical currents of the devices have also been measured. Different device configurations, single junctions, small series arrays and nanoSQUIDs, have been fabricated, to evaluate the reproducibility and uniformity of the two fabrication processes.

Autore Pugliese

• Maggi Sabino

Tutti gli autori

• M. Fretto; N. De Leo; L. Boarino; C. Cassiago; D. Imbraguglio; S. Maggi

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2017

ISSN

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ISBN

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Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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