Superconductivity behaviour in screen-printed YBa2Cu3O7 films
TL;DR: In this article, the authors have fabricated films of the high T c superconducting oxide YBa 2 Cu 3 O 7 by screen printing on alumina, calcia-stabilized zirconia, yttria stabilised zirconsia, SrTiO 3 and La 2 CuO 4 substrates.
About: This article is published in Thin Solid Films.The article was published on 1988-10-01. It has received 4 citations till now. The article focuses on the topics: Screen printing.
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TL;DR: The structural and electrical properties of indium tin oxide (In 2 O 3 /SnO 2 ) thin films grown using direct evaporation technique on various substrates at different temperatures were studied as discussed by the authors.
70 citations
TL;DR: In this article, the authors developed techniques for the in situ deposition of epitaxial YBCO films on 2-in-diameter wafers of LaAlO/sub 3/
Abstract: The authors have developed techniques for the in situ deposition of epitaxial YBCO films on 2-in-diameter wafers of LaAlO/sub 3/
15 citations
TL;DR: In this paper, a matrix-assisted pulsed laser evaporation (MAPLE) process is applied to deposit yttrium barium copper oxide (YBCO) superconductor particles on graphene sheets.
Abstract: Matrix-assisted pulsed laser evaporation (MAPLE) process demonstrates a versatile and contamination free deposition. Compared to conventional laser ablation deposition, MAPLE technique can realize the retention of the properties and structures of deposited biomaterials and hybrid nanocomposites without damaging the backbone of organic macromolecules. Here, MAPLE process is applied to deposit yttrium barium copper oxide (YBCO) superconductor particles on graphene sheets. The microstructures and elemental composition of YBCO nanoparticle deposited on graphene sheet by the MAPLE process were studied as a function of the irradiation time (t). The amount of YBCO nanoparticles deposited on graphene is increased with increasing t. The average particle size of the spherical YBCO nanoparticles deposited on graphene sheets is decreased from 70 ± 25 nm to 50 ± 15 nm when t increases from 0.5 h to 2.0 h. This study demonstrates that MAPLE is a suitable process for depositing superconductor nanoparticles on graphene sheets.
7 citations
TL;DR: In this paper, the influence of the heating conditions on the resulting properties of the films was tested using various annealing temperatures and times and XRD analysis revealed the presence of both 2212 and 2323 phases.
Abstract: Bi-Sr-Ca-Cu-O thick films were prepared by printing Bi 2 O 3 -PbO paste onto SrCaCu 2 O 4+ x substrates and subsequent heating. The influence of the heating conditions on the resulting properties of the films was tested using various annealing temperatures and times. The film annealed at 840°C for 12 h shows onset at about 115 K and T c0 at 99 K. XRD analysis reveals the presence of both “2212” and “2223” phases.
3 citations
References
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TL;DR: A stable and reproducible superconductivity transition between 80 and 93 K has been unambiguously observed both resistively and magnetically in a new Y-Ba-Cu-O compound system at ambient pressure.
Abstract: A stable and reproducible superconductivity transition between 80 and 93 K has been unambiguously observed both resistively and magnetically in a new Y-Ba-Cu-O compound system at ambient pressure. An estimated upper critical field H c2(0) between 80 and 180 T was obtained.
5,965 citations
TL;DR: Observation de la transition supraconductrice a 91 K, sur 1,5 K and determination of the densite de courant critique, de l'effet Meissner, du champ critique, du parametre de Sommerfeld, de parametres GL.
Abstract: We have prepared and identified as a single phase the high-temperature superconducting compound in the chemical system Y-Ba-Cu-O, an orthorhombic, distorted oxygen-deficient perovskite of stoichiometry ${\mathrm{Ba}}_{2}$${\mathrm{YCu}}_{3}$${\mathrm{O}}_{9\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ (\ensuremath{\delta}\ensuremath{\simeq}2.1). Samples exhibit zero resistance at 91 K, with a transition width of 1.5 K. The Meissner effect attains a value of 76% of the independently measured diamagnetic susceptibility. We estimate parameters that characterize this superconductor, e.g., \ensuremath{\gamma}\ensuremath{\simeq}3--5 mJ (mole Cu${)}^{\mathrm{\ensuremath{-}}1}$ ${\mathrm{K}}^{\mathrm{\ensuremath{-}}2}$. The critical current density at 77 K and H=0 exceeds 1100 A/${\mathrm{cm}}^{2}$.
1,264 citations
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.
Abstract: We report 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. Rutherford backscattering spectrometry showed the composition of these films to be close to that of the bulk material. Growth rates were typically 0.1 nm per laser shot. After an annealing treatment in oxygen the films exhibited superconductivity with an onset at 95 K and zero resistance at 85 and 75 K on SrTiO3 and Al2O3 substrates, respectively. This new deposition method is relatively simple, very versatile, and does not require the use of ultrahigh vacuum techniques.
1,122 citations
IBM1
TL;DR: The superconducting critical current in these films at 77 K is in excess of ${10}^{5}$ A/${\mathrm{cm}}^{2}$ and at 4.2 K in addition to this.
Abstract: We have grown epitaxial films of the ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{x}}$ compound on ${\mathrm{SrTiO}}_{3}$ substrates. The superconducting critical current in these films at 77 K is in excess of ${10}^{5}$ A/${\mathrm{cm}}^{2}$ and at 4.2 K in excess of ${10}^{6}$ A/${\mathrm{cm}}^{2}$.
693 citations
TL;DR: The crystal structure of the high-T/sub c/ superconducting phase Ba/sub 2/YCu/sub 3/O/sub 9-//sub delta/(delta = 2.0)= has been determined by single-crystal x-ray diffraction.
Abstract: The crystal structure of the high-T/sub c/ superconducting phase Ba/sub 2/YCu/sub 3/O/sub 9-//sub delta/(delta = 2.0)= has been determined by single-crystal x-ray diffraction. The compound crystallizes in an orthorhombic, oxygen-deficient perovskite superstructure with space group Pmmm, a = 3.856(2) A b = 3.870(2) A, and c = 11.666(3) A. The ordering of Ba and Y in a (Ba-Y-Ba)/sub infinity/ sequence along the c axis is responsible for the tripled cell. Two (CuO/sub 2/)/sub infinity/ planes with copper in distorted square planar coordination are the key to conductivity.
298 citations