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Niobium NanoSQUIDs Based on Sandwich Nanojunctions: Performance as a Function of the Temperature

Authors :
Carmine Granata
L. D’Ortenzi
Daniela Stornaiulo
Antonio Vettoliere
Francesco Tafuri
Paolo Silvestrini
Davide Massarotti
Vincenzo Lacquaniti
Matteo Fretto
Natascia De Leo
Berardo Ruggiero
Granata, Carmine
Massarotti, Davide
Vettoliere, Antonio
Fretto, Matteo
D'Ortenzi, Luca
De Leo, Natascia
Stornaiulo, Daniela
Silvestrini, Paolo
Ruggiero, Berardo
Tafuri, Francesco
Lacquaniti, Vincenzo
Granata, C.
Massarotti, D.
Vettoliere, A.
Fretto, M.
D'Ortenzi, L.
De Leo, N.
Stornaiuolo, D.
Silvestrini, P.
Ruggiero, B.
Tafuri, F.
Lacquaniti, V.
Source :
IEEE transactions on applied superconductivity, (2016). doi:10.1109/TASC.2015.2512047, info:cnr-pdr/source/autori:Granata, C. ; Massarotti, D. ; Vettoliere, A. ; Fretto, M. ; D'Ortenzi, L. ; De Leo, N. ; Stornaiuolo, D. ; Silvestrini, P. ; Ruggiero, B. ; Tafuri, F. ; Lacquaniti, V./titolo:Niobium nanoSQUIDs Based on Sandwich nanojunctions: Performance as a Function of the Temperature/doi:10.1109%2FTASC.2015.2512047/rivista:IEEE transactions on applied superconductivity (Print)/anno:2016/pagina_da:/pagina_a:/intervallo_pagine:/volume
Publication Year :
2016

Abstract

In this paper, an experimental investigation of the main characteristics of a niobium nano Superconducting QUantum Interference Device (nanoSQUID) as a function of the temperature (9-0.3 K) is presented. The nanosensor consists of a niobium superconducting loop (0.4 × 1.0μm2) interrupted by two sandwich nanojunctions (Nb/Al-AlOx/Nb) having an area of about (300 × 300) nm2. These nanodevices have been fabricated by means of a focused ion beam sculpting method, which is used as a lithographic technique to define the various elements of the SQUID. We have performed measurements of current-voltage, critical current-magnetic flux characteristics, and switching current distributions from the zero voltage state for different temperatures. The high critical current modulation depths and the low intrinsic dissipation exhibited by these devices ensure a suitable sensitivity for nanoscale applications in the whole temperature range investigated.

Subjects

Subjects :
Materials science
Focused ion beam, magnetic flux noise, nanoSQUID, sandwich nanojunctions
Electronic, Optical and Magnetic Material
Niobium
chemistry.chemical_element
Nanotechnology
Function (mathematics)
Condensed Matter Physic
Critical current density (superconductivity)
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Nanoscale devices
chemistry
Electrical and Electronic Engineering
SQUIDs
Magnetic flux

Details

Language :
English
Database :
OpenAIRE
Journal :
IEEE transactions on applied superconductivity, (2016). doi:10.1109/TASC.2015.2512047, info:cnr-pdr/source/autori:Granata, C. ; Massarotti, D. ; Vettoliere, A. ; Fretto, M. ; D'Ortenzi, L. ; De Leo, N. ; Stornaiuolo, D. ; Silvestrini, P. ; Ruggiero, B. ; Tafuri, F. ; Lacquaniti, V./titolo:Niobium nanoSQUIDs Based on Sandwich nanojunctions: Performance as a Function of the Temperature/doi:10.1109%2FTASC.2015.2512047/rivista:IEEE transactions on applied superconductivity (Print)/anno:2016/pagina_da:/pagina_a:/intervallo_pagine:/volume
Accession number :
edsair.doi.dedup.....85500df6a7aba52dfb98e2ca46bd637b
Full Text :
https://doi.org/10.1109/TASC.2015.2512047
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