Journal ArticleDOI
Characteristics of all YBa2Cu3O7 edge junctions operating above 80 K
TLDR
In this paper, an all-in- situ laser ablation deposition process was used, with the barriers formed by a plasma discharge in CF4 gas, to avoid possible laser induced damage to the films.Abstract:
a‐b plane YBa2Cu3O7‐YBa2Cu3O7 (YBCO) edge junctions with improved properties were prepared by the use of SrTiO3 instead of BaF2 as an insulating layer in the c‐axis direction. The junctions were fabricated in an all in situ laser ablation deposition process, with the barriers formed by a plasma discharge in CF4 gas. Photolithographic rather than laser ablation patterning of the junctions was used, to avoid possible laser induced damage to the films. The normal resistance of the junction decreased with T for T≳40 K, and increased at lower temperatures, indicating that carrier localization takes place in the barrier. At 80 K, a pronounced diffraction pattern of the voltage across the junction versus magnetic field was observed. Critical currents persisted up to 84 K, and under microwave radiation many Shapiro steps were observed.read more
Citations
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Journal ArticleDOI
Transport processes in YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox ramp type Josephson junctions
Y.M. Boguslavskij,J. Gao,Augustinus J.H.M. Rijnders,D. Terpstra,G.J. Gerritsma,Horst Rogalla +5 more
TL;DR: In this article, the PBCO barrier thickness and its nature is used to determine the Josephson and normal state behavior of YBCO/PBCO ramp junctions.
Journal ArticleDOI
High-T/sub c/ Josephson junctions by electron beam irradiation
TL;DR: In this article, Fraunhofer-type critical current behavior as a function of field (I/sub c/(H)), indicating reasonable current uniformity across the junction, has been observed.
Journal ArticleDOI
Y1Ba2Cu3O7/MgO/Y1Ba2Cu3O7 edge Josephson junctions
TL;DR: In this article, the authors used thin sputtered films of MgO (8−32 A) to produce a weak connection between high Tc electrodes, which can be well modeled by the resistively shunted junction (RSJ) equation and possess excellent Josephson properties, exhibiting strong magnetic field modulation and microwave response at 10 and 100 GHz up to 82 K.
Book ChapterDOI
Thin Film Structures
TL;DR: In this paper, the use of these methods is illustrated by an overview of approaches to the fabrication of Josephson junctions, as well as a review of the current methods of fabricating HTS thin film device structures.
Journal ArticleDOI
Properties of YBa2Cu3O7−δ/YBa2CoxCu3−xOy/YBa2Cu3O7−δ Josephson edge junctions with 0.1 ⩽x⩽ 0.3 and the effect of flux flow on their normal resistance
Gideon Koren,Emil Polturak +1 more
TL;DR: In this article, the conductance values of YBa2Cu3O7−δ (YBCO)-based SNS edge junctions with cobalt doped YBCO barriers were prepared and characterized, and the corresponding IcRN products were observed to scale as J0.66±0.09c.
References
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Book
Physics and applications of the Josephson effect
TL;DR: In this paper, the authors describe the properties of weak superconductivity and weak weak link structures, including the Josephson effect, and their application in superconducting Loops.
Journal ArticleDOI
Thermally activated phase slippage in high-Tc grain-boundary Josephson junctions.
TL;DR: The effect of thermally activated phase slippage (TAPS) in grain-boundary Josephson junctions has been studied and the implications of TAPS on the applicability of high-performance superconducting order parameter at the grain- boundary interface are outlined.
Journal ArticleDOI
Superconducting Quantum Interference Devices and their Applications
TL;DR: Hahlbohm and Lubbig as discussed by the authors published a volume containing the 74 papers given at the second conference on superconducting quantum devices, held in Berlin last year, which was called SQUID '80.
Journal ArticleDOI
Controlled preparation of all high Tc SNS-type edge junctions and DC-SQUIDs
TL;DR: In this paper, a high-Tc SNS-type Josephson junction and DC SQUIDs were successfully fabricated using hetero-epitaxially grown multilayers of YBa2Cu3Ox and PrBa2cu3Ox.