Journal ArticleDOI
Intrinsic superconductor/normal‐metal/superconductor‐like weak links in Y1Ba2Cu3O7−x thin films
P. England,Thirumalai Venkatesan,X. D. Wu,A. Inam,M. S. Hegde,T. L. Cheeks,Harold G. Craighead +6 more
TLDR
In this article, magnetic field measurements on micron-sized wires of the thin-film high Tc superconductor Y1 Ba2 Cu3 O7−x made by pulsed laser deposition reveal an exponential suppression of the critical current with magnetic field.Abstract:
Magnetotransport measurements on micron‐sized wires of the thin‐film high Tc superconductor Y1 Ba2 Cu3 O7−x made by pulsed laser deposition reveal an exponential suppression of the critical current with magnetic field, and a power law dependence of the critical current on reduced temperature. We ascribe this behavior to crystallographic defects in the film which behave as superconductor/normal‐metal/superconductor weak links in a magnetic field. From the measurements we estimate a critical current density of 106 A cm−2 in a field of 16 T at 4.2 K.read more
Citations
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Journal ArticleDOI
Optical response of nongranular high‐Tc Y1Ba2Cu3O7−x superconducting thin films
TL;DR: In this article, the optical response of c-axis oriented crystalline Y1Ba2Cu3O7−x thin films (bridge and meander devices) on strontium titanate and MgO substrates was investigated.
Journal ArticleDOI
Observation of fast nonbolometric optical response of nongranular high Tc Y1Ba2Cu3O7−x superconducting thin films
TL;DR: In this article, fast optical response measurements in predominantly c-axis oriented crystalline Y1Ba2Cu3O7−x superconducting thin films at the wavelength of 1.06 μm were reported.
Journal ArticleDOI
Lorentz-force-independent dissipation in high-temperature superconductors
TL;DR: In this paper, it was shown that the conventional flux-motion mechanism does not play a major role in dissipation in high-Tc superconductors, and instead, mechanisms that take into account the superconducting fluctuation effect in the super-conducting order parameter have been proposed and have successfully been applied to analyse experimental results.
Journal ArticleDOI
Microwave properties of YBa2Cu3O7−δ high‐transition‐temperature superconducting thin films measured by the power transmission method
TL;DR: In this paper, the microwave response of YBa2Cu3O(7-delta) superconducting thin films deposited on LaAlO3, MgO, YSZ, and LaGaO3 substrates are studied.
Journal ArticleDOI
Scaling law for critical currents and magnetization in high temperature superconductors
TL;DR: In this paper, the role of statistical summation of pinning forces to give an effective volume force should be reconsidered, and it is proposed that thermal activation reduces the number of active pinning interactions with rising temperature and field, in addition to the expected effects of flux creep.
References
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Book
Superconductivity of metals and alloys
TL;DR: Superconductivity of Metals and Alloys as mentioned in this paper is an introductory course at the University of Orsay, which is intended to explain the basic knowledge of superconductivity for both experimentalists and theoreticians.
Journal ArticleDOI
Preparation of Y‐Ba‐Cu oxide superconductor thin films using pulsed laser evaporation from high Tc bulk material
D. Dijkkamp,Thirumalai Venkatesan,X. D. Wu,S. A. Shaheen,Najeh Jisrawi,Y. H. Min‐Lee,W. L. McLean,Mark Croft +7 more
TL;DR: In this paper, the first successful preparation of thin films of Y-Ba-Cu-O superconductors using pulsed excimer laser evaporation of a single bulk material target in vacuum was reported.
Journal ArticleDOI
Thermally activated dissipation in Bi2.2Sr2Ca0.8Cu2O8+δ
TL;DR: In this paper, a new dissipation behavior is reported in superconducting Bi2.2Sr2Ca0.8Cu2Oa+δ for all temperatures below Tc and all magnetic fields exceeding Hc1.
Journal ArticleDOI
Thermally activated dissipation in Bi/sub 2. 2/Sr/sub 2/Ca/sub 0. 8/Cu/sub 2/O/sub 8+//sub delta/
TL;DR: In this paper, a new dissipation behavior is reported in superconducting Bi/sub 2.2/Sr/sub2/Ca/sub 0.8/Cu/sub O/O/sub 8+//sub delta/ for all temperatures below T/sub c/ and all magnetic fields exceeding H/sub 1/.
Journal ArticleDOI
Reproducible technique for fabrication of thin films of high transition temperature superconductors
TL;DR: In this article, a new process was proposed to make films of Y1Ba2Cu3O7 using coevaporation of Y, Cu, and BaF2 on SrTiO3 substrates.
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