TITLE

Superconducting Tl-Ca-Ba-Cu-O thin films with zero resistance at temperatures of up to 120 K

AUTHOR(S)
Lee, W. Y.; Lee, V. Y.; Salem, J.; Huang, T. C.; Savoy, R.; Bullock, D. C.; Parkin, S. S. P.
PUB. DATE
July 1988
SOURCE
Applied Physics Letters;7/25/1988, Vol. 53 Issue 4, p329
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have prepared superconducting Tl-Ca-Ba-Cu-O thin films on a variety of substrates with transition temperatures as high as [bar_over_tilde:_approx._equal_to]120 K, confirmed by sharp onsets of substantial Meissner and shielding signals at the same temperatures. The properties of the films are found to depend sensitively on the post-annealing conditions. Highly textured c-axis-oriented films comprised mostly of Tl2Ca1Ba2Cu2Ox, Tl1Ca2Ba2Cu3Ox, and Tl2Ca2Ba2Cu3Ox were synthesized by varying the annealing procedure with corresponding maximum superconducting transition temperatures of [bar_over_tilde:_approx._equal_to]100, 110, and 120 K, respectively.
ACCESSION #
9827498

 

Related Articles

  • Electrical-transport properties and microwave device performance of sputtered TlCaBaCuO superconducting thin films. Subramanyam, G.; Kapoor, V. J.; Chorey, C. M.; Bhasin, K. B. // Journal of Applied Physics;9/15/1992, Vol. 72 Issue 6, p2396 

    Presents a study that examined thallium-calcium-barium-copper-oxygen superconducting thin films deposited on lanthanum aluminate substrates. Use of radio frequency magnetron sputtering and postannealing methods; Importance of copper-oxide high transition temperature superconductors; Information...

  • Anisotropic transport and cation disorder in superconducting Tl2Ca2Ba2Cu3Ox single crystals. Tigges, C. P.; Venturini, E. L.; Kwak, J. F.; Morosin, B.; Baughman, R. J.; Ginley, D. S. // Applied Physics Letters;7/30/1990, Vol. 57 Issue 5, p517 

    We have measured for the first time the temperature-dependent anisotropic resistivity of several Tl2Ca2Ba2Cu3Ox single crystals. The resistivity ratio between the c axis and the a-b plane orientations in the best crystals is approximately 60 at room temperature. Resistivity data indicate...

  • Preparation of superconducting Tl-Ca-Ba-Cu thin films by chemical deposition. Olson, William L.; Eddy, Michael M.; James, Tim W.; Hammond, Robert B.; Gruner, George; Drabeck, Larry // Applied Physics Letters;7/10/1989, Vol. 55 Issue 2, p188 

    A chemical deposition process for the preparation of superconducting thin films of Tl2CaBa2Cu2O8 (2122) and Tl2Ca2Ba2Cu3O10 (2223) has been developed. Oriented, superconducting 2122 and 2223 thin films have been successfully fabricated on single-crystal yttria-stabilized zirconia and magnesium...

  • Metalorganic chemical vapor deposition of Tl2CaBa2Cu2Oy superconducting thin films on sapphire. Zhang, K.; Boyd, E. P.; Kwak, B. S.; Wright, A. C.; Erbil, A. // Applied Physics Letters;9/18/1989, Vol. 55 Issue 12, p1258 

    Superconducting Tl2CaBa2Cu2Oy thin films have been successfully grown on the single-crystal sapphire (1102) substrate by using the metalorganic chemical vapor deposition technique. The growth rate of the films was about 5 μm/h. The as-deposited film was post-annealed in a partially sealed...

  • Microwave surface resistance of bulk Tl-Ba-Ca-Cu-O superconductors. Newman, H. S.; Singh, A. K.; Sadananda, K.; Imam, M. A. // Applied Physics Letters;1/23/1989, Vol. 54 Issue 4, p389 

    The first measurements of the microwave surface resistance at 18 GHz of bulk Tl-Ba-Ca-Cu-O superconductors produced by the hot isostatic pressing (HIP) process are reported. The superconducting samples, prepared by solid-state reaction with subsequent sintering and consolidation to obtain ideal...

  • New family of high Tc superconductors in the (Tl1-xMx)Sr2(Ca1-yYy)Cu2O7-δ system (M=IVA and VA elements). Liu, R. S.; Zhou, W.; Edwards, P. P. // Applied Physics Letters;12/3/1990, Vol. 57 Issue 23, p2492 

    A new family of high Tc superconductors with superconducting transition temperatures ranging from 40 to 100 K have been synthesized in the (Tl1-xMx)Sr2 (Ca1-yYy)Cu2O7-δ (M=Ti, Zr, Hf, V, Nb, and Ta) system. Here, we use as an example, vanadium and yttrium substitution into the thallium and...

  • Persistent currents in Tl-Ba-Ca-Cu-O superconductors. Grader, G. S.; Gyorgy, E. M.; Van Uitert, L. G.; Grodkiewicz, W. H.; Kyle, T. R.; Eibschutz, M. // Applied Physics Letters;7/25/1988, Vol. 53 Issue 4, p319 

    We have demonstrated the presence of circulating circumferential currents in toroids of Tl-Ba-Ca-Cu-O superconductors at 77.3 and 90.2 K. The nominal composition was Tl1.5Ba2Ca2Cu3Ox; however, both the x-ray diffraction pattern and the Meissner effect indicate the presence of more than one...

  • New family of thallium cuprate superconductors not containing calcium or barium: TlSrn+1-xLnxCunO2n+3+δ (Ln=La, Pr, or Nd). Ganguli, A. K.; Manivannan, V.; Sood, A. K.; Rao, C. N. R. // Applied Physics Letters;12/18/1989, Vol. 55 Issue 25, p2664 

    The first two members of the new TlSrn+1-xLnxCunO2n+3+δ (Ln=La, Pr, or Nd) series of superconducting cuprates possessing 1021 and 1122 type structures are described. The n=1 (1021) members with Tcs around 40 K have electrons or holes as the majority charge carriers depending on x. The n=2...

  • Formation of superconducting (Tl,Bi)Sr2CaCu2Oy thin films by rf sputtering and thallium diffusion. Liu, R. S.; Edwards, P. P.; Hunneyball, P. D.; Bennett, M. J.; Jedamzik, D.; Harrison, M. R.; Horley, R. J. // Applied Physics Letters;5/21/1990, Vol. 56 Issue 21, p2135 

    We have prepared new high Tc superconducting thin films of (Tl,Bi)-Sr-Ca-Cu-O by combining low temperature (500 °C) rf sputtering of Bi-Sr-Ca-Cu-O precursor films and thallium diffusion. A typical film has Tc(onset) =80 K, Tc(midpoint) =79 K, and Tc(zero) =50 K. X-ray diffraction and energy...

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