Fabrication of Superconducting Quantum Interference Device with Thin-Film Quantum Point Contacts
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概要
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We have fabricated dc-supercondtucting quantum interference devices (SQUIDs) with all-thin-film point contacts (Nb-Nb nanoconstriction-NbN). The size of the nanoconstriction may be smaller than the superconductingcoherence length of bulk Nb. The quasiparticle characteristic of the all-thin-filrm point contact can be explained using the Blonder, Tinkham and Klapwijk (BTK) quasiparticle current which is applicable to the superconducting quantum point contact. Tlae flux noise of SQUID with 1-O pH operated in a flux locked loop is 8 μφ_0/Hz^1/2>at 1 Hz, and 4 μφ_0/Hz^<1/2>at at frequencies above 10 Hz is limited by the preamplifier.
- 社団法人応用物理学会の論文
- 1994-12-30
著者
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Abe H
Tokin Corp. Miyagi Jpn
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Abe Hiroya
Department Of Electrical Engineering Kyoto Institute Of Technology
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HAMASAKI Katuyoshi
Department of Electrical Engineering, Nagaoka University of Technology
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ISHIGURO Takashi
Department of Electrical Engineering, Nagaoka University of Technology
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Hamasaki Katuyoshi
Department Of Electrical Engineering Nagaoka University Of Technology
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Ishiguro Takashi
Department Of 2nd Physiology Showa University School Of Medicine
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