TITLE

Grain growth of rapid-thermal-annealed Y-Ba-Cu oxide superconducting thin films

AUTHOR(S)
Hamdi, A. H.; Mantese, J. V.; Micheli, A. L.; Waldo, R. A.; Chen, Y. L.; Wong, C. A.
PUB. DATE
August 1988
SOURCE
Applied Physics Letters;8/1/1988, Vol. 53 Issue 5, p435
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A study of the microstructure of Cu-rich and stoichiometric Y-Ba-Cu oxide thin-film superconductors is presented. The films were deposited on <100> SrTiO3 by the nonvacuum technique of metalorganic deposition followed by rapid thermal annealing in oxygen. Analysis showed that for annealing temperatures below 900 °C, grain size increased with increased annealing temperature, with an enhancement in grain growth for the Cu-rich films. Annealing near or above the melting point of the 1-2-3 phase causes only a slight increase in the rate of grain growth and no detectable effects of the excess Cu. Annealing above 920 °C produces segregated CuO islands 5–10 μm in size in the Cu-rich films. Oriented grain growth was found for the 1-2-3 grains with their c axis perpendicular and parallel to the SrTiO3 substrates. Sheet resistivity measurements were correlated with grain size, phase separation, and oriented grain growth. An anomalous behavior in the resistance-temperature plot at 220–240 K of the Cu-rich films is shown to be related to the presence of the excess Cu.
ACCESSION #
9827571

 

Related Articles

  • Superconducting contacts for use in niobium thin film applications. Garfield, James R.B. // Review of Scientific Instruments;Apr97, Vol. 68 Issue 4, p1906 

    Describe a simple method for forming superconducting contacts to niobium thin films as used for current perpendicular to the plane measurements of the resistance of magnetic multilayers using an indium-Roses alloy. Measurement of the superconducting transition temperature; Cooling of samples;...

  • Epitaxy of HgBa[sub 2]CaCu[sub 2]O[sub 6] superconducting films on biaxially textured Ni substrates. Xie, Y. Y.; Xie, Y.Y.; Aytug, T.; Wu, J. Z.; Wu, J.Z.; Verebelyi, D. T.; Verebelyi, D.T.; Paranthaman, M.; Goyal, A.; Christen, D. K.; Christen, D.K. // Applied Physics Letters;12/18/2000, Vol. 77 Issue 25 

    Superconducting HgBa[sub 2]CaCu[sub 2]O[sub 6] (Hg-1212) films have been coated on biaxially textured Ni substrates buffered with CeO[sub 2]/YSZ/CeO[sub 2] trilayers. A two-step cation-exchange process was employed for Hg-1212 coatings, whereby epitaxial Tl[sub 2]Ba[sub 2]CaCu[sub 2]O[sub 8]...

  • Thin-film dc SQUID consisting of quasiparticle-injected superconducting weak links. Kojima, K.; Nara, S.; Hamanaka, K. // Applied Physics Letters;8/1/1985, Vol. 47 Issue 3, p325 

    A thin-film dc superconducting quantum interference device (SQUID) consisting of quasiparticle-injected superconducting weak links was fabricated and successfully operated. This SQUID was made on a silicon substrate and it consists of a ∼ 100-nm-thick lead alloy with two injector junctions....

  • Versatile new metalorganic process for preparing superconducting thin films. Gross, M. E.; Hong, M.; Liou, S. H.; Gallagher, P. K.; Kwo, J. // Applied Physics Letters;1/11/1988, Vol. 52 Issue 2, p160 

    A new technique for producing thin films of the high-temperature perovskite superconductors, LnBa2Cu3O7-x, where Ln represents a rare-earth element, using spin-on metalorganic precursors is described. Pyrolysis of the spin-coated films, consisting of mixed metal (2-ethyl hexanoates), leads to...

  • In situ resistance of Y1Ba2Cu3Ox films during anneal. Davidson, A.; Palevski, A.; Brady, M. J.; Laibowitz, R. B.; Koch, R.; Scheuermann, M.; Chi, C. C. // Applied Physics Letters;1/11/88, Vol. 52 Issue 2, p157 

    Measurements of electrical resistance of thin films of the high-temperature superconductor Y1Ba2Cu3Ox have been carried out between 100 and 800 �C, and in the range between roughly 0.1 and 1 atm of ambient oxygen. Results are reported for both quick and slow heating, and also for sudden...

  • Microstructures of YBa2Cu3O7-x superconducting thin films grown on a SrTiO3(100) substrate. Chen, C. H.; Kwo, J.; Hong, M. // Applied Physics Letters;3/7/1988, Vol. 52 Issue 10, p841 

    We report microstructures of superconducting YBa2Cu3O7-x thin films epitaxially grown on a SrTiO3(100) substrate. Transmission electron microscopy studies reveal epitaxial, highly ordered grains ∼5000 Å in size for both types of films with either the a or c axis perpendicular to the...

  • Structure and superconducting properties of Y1Ba2Cu3O7-δ films prepared by transversely excited atmospheric pressure CO2 pulsed laser evaporation. Miura, S.; Yoshitake, T.; Satoh, T.; Miyasaka, Y.; Shohata, N. // Applied Physics Letters;3/21/1988, Vol. 52 Issue 12, p1008 

    Superconducting Y1Ba2Cu3O7-δ films were prepared by TEA-CO2 pulsed laser evaporation. On SrTiO3(100) the a axis was oriented perpendicular to the substrate surface, while the <110> axis was oriented perpendicular to the substrate surface on SrTiO3(110). Sharp resistive superconducting...

  • Chemical etching of Y-Cu-Ba-O thin films. Shih, I.; Qiu, C. X. // Applied Physics Letters;5/2/1988, Vol. 52 Issue 18, p1523 

    Thin films of Y-Ba-Cu-O have been deposited by rf sputtering using a stoichiometric target on alumina, zirconia, and Y2O3 coated silicon substrates. After a brief heat treatment in oxygen, a resistive transition was observed with an onset temperature from 89 to 94.6 K. Etching experiments of the...

  • Superconducting Y1Ba2Cu3O7-x films on Si. Venkatesan, T.; Chase, E. W.; Wu, X. D.; Inam, A.; Chang, C. C.; Shokoohi, F. K. // Applied Physics Letters;7/18/1988, Vol. 53 Issue 3, p243 

    By depositing YBaCuO films at low substrate holder temperatures (600 °C) using a pulsed laser, films with the orthorhombic phase exhibiting superconductivity with high zero resistance temperatures (Tc0) were produced. Tc0 values as high as 50 and 80 K were seen on films deposited directly on...

  • Deposition of superconducting Y-Ba-Cu-O films at 400 °C without post-annealing. Witanachchi, S.; Kwok, H. S.; Wang, X. W.; Shaw, D. T. // Applied Physics Letters;7/18/1988, Vol. 53 Issue 3, p234 

    Superconducting thin films of Y1Ba2Cu3O7-x were fabricated using the process of plasma-assisted laser deposition. The substrate temperature was as low as 400 °C and high-temperature post-annealing in an O2 atmosphere was not necessary. The as-deposited films have a Tc of ∼85 K, and are...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics