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Showing 1 to 17 of 17 for “"superconducting films"”.
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Superfluid Density Measurements of High-Temperature Superconducting Films
… suitable for measuring the superfluid density of superconducting films. With this system we measure several intrinsic properties of YBa2Cu3O7-x (YBCO) and Bi2Sr2CaCu2O8+δ (Bi-2212) films. Two competing models of the pseudogap are compared to the temperature dependence of the superfluid density as …
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Photon-induced vortex-antivortex pair creation in superconducting films
We have used a dc SQUID (Superconducting Quantum Interference Device) to study vortex-antivortex pair creation in both two-dimensional superconducting films and Josephson junction arrays in the presence of 850 nm light irradiation. Specifically the experiments aim to distinguish between the …
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Upper critical magnetic field of superconducting films with magnetic impurities
… field, H(T), of c2 In-Mn and Pb-Mn alloy films. Hc2 was determined from the resistance of the films. The results were compared with the theory of Fulde and MakL This theory assumes that the electron-phonon coupling is weak, and that the interaction between the impurity spins and the …
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Electron Thermal Conductivity of Thin Superconducting Films in Metallic Contact--the Proximity Effect
Made available in DSpace on 2015-05-12T22:39:01Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7412109.PDF: 2960665 bytes, checksum: 448bb79b9a9f53b72cdd065f35a6e112 (MD5) Previous issue date: 1973
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Electron Thermal Conductivity of Thin Superconducting Films in Metallic Contact - The Proximity Effect
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2011-11-14T19:58:24Z No. of bitstreams: 1 1973_migliori.pdf: 3086672 bytes, checksum: 49a1a634745ce02616ae5ebc6271e20b (MD5)
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Specific heat of superconducting films of indium and of indium alloyed with magnetic impurities
… discontinuity !1c in the specific heat at the superconducting transmission for quench-condensed films of indium, indium-manganese, and indium-chromium. Manganese and chromium are 3-d transition elements, and retain their magnetism when dissolved in indium. This is the first (investigation of …
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Microstructure and phase development in yttrium barium(2) copper(3) oxygen(7) superconducting films prepared from carboxylate precursors
Superconducting $\rm YBa\sb2Cu\sb3O\sb{7-x}$ thin films, 0.1-1.5 $\mu$m thick, were prepared from carboxylate precursors by reactive liquid phase sintering. Processing effects on phase development, microstructure evolution, and important film properties, such as transition temperature, critical …
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The current-voltage characteristics of linear chains of submicron Josephson tunnel junctions
The recent experimental results on granular superconducting films have suggested an universal sheet resistance threshold of 6.4 k$\Omega$/square, below which all films become superconducting with decreasing temperature, and above which all films become insulating with decreasing temperature. At the …
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Electron thermal conductivity of thin films of strong-coupling superconductors and of superconductors containing rare earth impurities
… measured the thermal conductivity of several superconducting films. These films were evaporated onto substrates held at liquid helium temperatures, and therefore the phonon mean free path in these films was very short. Consequently, the phonons contributed very little to the thermal …
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Growth, Characterization and Measurement of Epitaxial Sr2RuO4 Thin Films
… the growth of c-axis oriented Sr2RuO4 thin films using pulsed laser deposition and their electrical transport properties are systematically discussed. The deposition and optimization process involved several progressive steps. Specifically, the first focus was on the Sr2RuO4 phase …
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Novel process and apparatus design for metalorganic chemical vapor deposition (MOCVD) of superconducting thin films
… are capable of producing very high quality YBCO superconducting films, but their deposition rates are too slow to be commercially viable; liquidsource MOCVD systems can be precisely controlled, but the solvents they require tend to kill superconducting oxides; and solid-source MOCVD systems …
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Measurements of superconducting phase gradients by a nanowire quantum interference device templated by DNA molecules
… We have developed a process to make superconducting nanowires templated by DNA molecules that are homogeneous, are less than 10 nm in diameter, make seamless contacts the leads, and become superconducting at low temperatures. Our method involves isolating single DNA strands stretched …
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Superconducting thin film nanoelectronics
Superconducting devices have found application in a diverse set of fields due to their unique properties which cannot be reproduced in normal materials. Although many of these devices rely on the properties of bulk superconductors, superconducting devices based on thin films are finding increasing …
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Study of nonlinear microwave properties of high-temperature superconducting film
… of nonlinear properties of high-temperature superconducting films at microwave frequencies. The effect of patterning on the nonlinear microwave surface resistance of HTS films was studied by comparing the results of a dielectric-resonator technique and a stripline-resonator technique. We have …
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Thermal conductivity of superconducting alloy films in a perpendicular magnetic field
We have measured the thermal conductivity of superconducting films of In - Bi alloys in a perpendicular magnetic field. The films were quench-condensed onto glass substrates held at 77 K, and had thicknesses ranging from l050 to 4570 A. The ratios of the BCS coherence length to the electron mean …
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Electromagnetic penetration depth in superconducting alloys containing magnetic impurities
… of an axial magnetic field by cylindrical, thin, superconducting films were made by using a SQUID-based magnetometer. The sample films were between 40 and 85 A thick. They were composed of indium and of indium containing a small amount of gadolinium. Each film was made by flash-evaporating pellets …
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Two-dimensional superconducting states near zero temperature quantum phase transitions
… are predicted to exist at zero temperature – superconducting and insulating. Contrary to this theoretical expectation, previous transport measurements on 2-dimensional (2D) thin films have found evidence for metallic resistivity down to extremely low temperatures when using either disorder or …