Journal ArticleDOI
A Josephson junction to FET high speed line driver made of TlCaBaCuO
TLDR
In this paper, a Tl-Ca-Ba-Cu-O superconducting flux flow transistor (SFFT) was used as an active impedance converter between Josephson and FET circuitry.Abstract:
A Tl-Ca-Ba-Cu-O superconducting flux flow transistor (SFFT) was used as an active impedance converter between Josephson and FET circuitry. The input of the flux flow device is a control line of low impedance that can be driven by a tunnel junction. The output is the signal across the SFFT which is made of a parallel array of weak links. The output impedance is typically greater than 5 Omega , with a maximum voltage swing of over 100 mV into a 50- Omega system. The switching of an all-Nb junction induced a 90-mV voltage swing at the FET input and over 200 mV at the FET output. The line driver can operate anywhere between 4.2 K and 85 K with minor changes in speed (+or-5 ps) and output level (+or-10 mV). The switching time measured was about 100 ps and was fixture limited.read more
Citations
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Patent
Superconductor-semiconductor hybrid memory circuits with superconducting three-terminal switching devices
Uttam S. Ghoshal,Harry Kroger +1 more
TL;DR: Superconducting-semiconducting hybrid memories as mentioned in this paper utilize semiconductor circuits to store information, and either superconducting or semiconducting, with at least some super-conducting circuitry used, to write and read information.
Journal ArticleDOI
Thin‐film multilayer interconnect technology for YBa2Cu3O7−x
TL;DR: In this paper, the use of pulsed laser deposition in conjunction with shadow mask patterning, photolithographic pattern definition, acid etching, ionbeam etching and surface cleaning to produce multilayer interconnects from YBa2Cu3O7−x (YBCO) is discussed.
Journal ArticleDOI
Synthesis and properties of tl-ba-ca-cu-o superconductors
TL;DR: In this article, the synthesis methods and properties of single crystal, powder, and thin film TlBaCaCuO high-temperature superconducting (Tl-HTS) materials are reviewed.
Journal ArticleDOI
A model and equivalent circuit for a superconducting flux flow transistor
TL;DR: In this article, a three-terminal high-frequency active device made of a single film of a high T/sub c/ superconductor that is based on the magnetic control of flux flow is presented.
Journal ArticleDOI
Flux‐flow transistors based on long YBa2Cu3O7−δ bicrystal grain boundary junctions
TL;DR: In this article, a normal metal loop, separated from the junction by an SiO layer, was used as the current control line, which modulated the critical current, which for temperatures ≤ 60 K showed the typical dependence for a long junction, while at higher temperatures the regular small junction modulation was seen.
References
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Journal ArticleDOI
Superconducting weak links
TL;DR: In this paper, a review of the properties of superconducting weak links is presented, where the authors cover experimental results and theoretical ideas on the properties and properties of weak links, i.e., weak electrical contacts between super-conducting electrodes which exhibit direct conductivity.
Book
Magnetic Flux Structures in Superconductors
TL;DR: The first edition of this book provided an introduction to the many static and dynamic features of magnetic flux structures in what are now called classical or low-temperature superconductors.
Journal ArticleDOI
Selective niobium anodization process for fabricating Josephson tunnel junctions
TL;DR: In this paper, a novel process for fabricating refractory sperconducting tunnel junctions is described, which is useful with both deposited and native oxide barriers, where the entire superconductor-barrier-superconductor sandwich is formed before the patterning of any layer.
Journal ArticleDOI
Sequential electron beam evaporated films of Tl2CaBa2Cu2Oy with zero resistance at 97 K
TL;DR: In this article, the Tl2Ca1Ba2Cu2Oy polycrystalline films were obtained by sequential electron beam evaporation of multiple Tl, Ca, Ba, and Cu layers and a two-stage anneal under controlled Tl and oxygen overpressures.
Journal ArticleDOI
S parameter measurements on single superconducting thin-film three-terminal devices made of high-Tc and low-Tc materials
TL;DR: In this article, a three-terminal single-layer thin-film superconducting device made of YBaCuO and Nb was investigated as an rf amplifier.