Nb/Al-oxide/Nb and NbN/MgO/NbN tunnel junctions in large series arrays for voltage standards

Series arrays of 1440 Josephson tunnel junctions were fabricated out of Nb/AN-oxide/Nb- and Nb/NbN/MgO/NbN/Nb-sandwiches The arrays provide microwave-induced constant voltage steps of at least one volt. The good stability of hard superconductor tunnel junctions against room temperature storage and t...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 25; no. 5; pp. L343 - L345
Main Authors NIEMEYER, J, SAKAMOTO, Y, VOLLMER, E, HINKEN, J. H, SHOJI, A, NAKAGAWA, H, TAKADA, S, KOSAKA, S
Format Journal Article
LanguageEnglish
Published Tokyo Japanese journal of applied physics 01.05.1986
Subjects
Applied sciences
Electronics
Exact sciences and technology
Testing, measurement, noise and reliability
Aluminium Oxides
Niobium Nitrides
Josephson junction
Superconducting tunnel junction
Superconductivity
Voltage
Standard
Magnesium Oxides
Niobium
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Summary:Series arrays of 1440 Josephson tunnel junctions were fabricated out of Nb/AN-oxide/Nb- and Nb/NbN/MgO/NbN/Nb-sandwiches The arrays provide microwave-induced constant voltage steps of at least one volt. The good stability of hard superconductor tunnel junctions against room temperature storage and thermal cyling suggests that these arrays might be very useful for the constructions of practical lasting Josephson voltage standards of high precision.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.25.l343