Growth and characterization of superconducting films Tl0.78Bi0.22Sr1.6Ba0.4Ca 2Cu3O9 on CeO2-buffered single crystal YSZ

Z. F. Ren, W. Li, D. Z. Wang, J. Y. Lao, J. H. Wang, M. Paranthaman, D. T. Verebelyi, D. K. Christen

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Crystalline CeO2 as a buffer layer on single crystal yttrium stabilized zirconia (YSZ) has been deposited in situ at 600-650°C by laser ablation. Following the deposition of CeO2, Tl0.78Bi0.22Sr1.6Ba0.4Ca 2Cu3O9 ((Tl,Bi)-1223) amorphous films were deposited on the CeO2-buffered YSZ substrate at room temperature. The deposited amorphous films were then wrapped together with an unfired Tl0.95Bi0.22Sr1.6Ba0.4Ca 2Cu3O9 pellet in silver foil. The whole package was finally annealed ex situ in a tube furnace at 790-810°C with flowing argon to crystallize the films. X-ray diffraction (XRD) shows that the annealed films consist of mainly c-axis aligned (Tl,Bi)-1223 phase with a small amount of (Tl,Bi)-1212 phase. The full width at half maximum (FWHM) values of XRD ω-scans at (007) of (Tl,Bi)-1223 phase and (005) of (Tl,Bi)-1212 phase are 0.44° and 0.48° respectively. XRD φ-scans on (102) of both (Tl,Bi)-1223 and (Tl,Bi)-1212 phases show an excellent in-plane alignment with FWHM values of 0.44° and 0.54°, respectively. Four-probe transport measurements show superconducting transition temperatures (Tc's) of 105-109 K depending on the annealing conditions. At 77 K and zero external magnetic field, transport critical current density (Jc) is in the range of (0.6-1) × 106 A/cm2 for samples with thickness of 1.5-1.8 μm.

Original languageEnglish
Pages (from-to)149-153
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume306
Issue number1-2
DOIs
StatePublished - Sep 10 1998

Funding

The work performed at the State University of New York at Buffalo (SUNY at Buffalo) was sponsored in part by New York State Energy Research and Development Authority (NYSERDA), Oak Ridge National Laboratory (ORNL), National Renewable Energy Laboratory (NREL), and National Science Foundation (NSF). The work performed at Oak Ridge National Laboratory (ORNL) was co-sponsored by the DOE Division of Materials Sciences, and by the DOE Office of Electric Utility Concepts, Superconductivity Program for Electric Power Systems, both under Contract No. DE-AC05-96OR22464 with Lockheed Martin Energy Research.

Keywords

  • CeO-buffered single crystal YSZ
  • Superconducting films
  • TlBiSrBaCa CuO

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