Synthesis of high-T_csuperconducting films by deposition from an aerosol

Abstract

In the following survey a rather promising, simple, non-vacuum method of preparation of high-& (HT,) superconducting films synthesized by means of chemical deposition from an aerosol is described. Thin HT, films of YBCO, BSCCO and TBCCO systems were prepared by this method. Some details of the deposition process as well as the deposition technique are given. Properties of prepared YBCO, BSCCO and TBCCO films are presented. The best films, suitable eventually for high-temperature, high-current and high-field applications, are so far polycrystalline films of the TBCCO 1223 system prepared on polycrystalline YSZ substrates having Tc = 104-107 K, and J, = 110000 A cm-*/77 K, B = 0; Jc = lo4 A cm-*/60 K, B = 2 T, or Jc = I O 5 A ~m -~/ 4 . 2 K, B = 9 T. Possible mechanisms of this high-current ability are discussed. Contents 2.5. Substrates used for aerosol deposition 2.6. The aerosol deposition technique 3.1. Sample preparation and characterization 3.2. Properties of prepared films 4.1. Sample preparation and characterization 4.2. Properties of prepared films 5.1. Sample preparation and characterization 5.2. Properties of prepared films 3. YBCO thin films 4. BSCCO thin films 5. TBCCO thin films 6. Conclusion * I

Temperature and Magnetic Field Dependences of Critical Current of Thallium-Based Superconducting Films

“…Samples 1 and 2 were prepared by screen printing thallium-free precursor material on monocrystalline (100) lanthanum aluminate substrates followed by ex situ thallination. The preparing procedures are described in earlier papers [1,2,5,6]. The resulting films were quasi-monocrystalline with high ab alignment and c-axis orientation and of high purity.…”

Tl-based superconductors for high-current, high-field applications

“…Spray deposition from aerosol is a non-vacuum, rather simple and technologically nonpretentious method used in the preparation of films with thicknesses, t > 1 µm, on substrates of various shapes. To date, films of all HT c systems already suitable for practical applications-YBCO, BSCCO and TBCCO films-have been synthesized by this procedure (this subject has been reviewed recently elsewhere [65]).…”

Spray pyrolysis of epitaxial YBCO films on (100) single crystal SrTiO3substrates

“…Spray pyrolysis has been used for preparing hightemperature superconductors almost since their discovery over 10 years ago [4][5][6][7][8]. Until recently, however, the usual approach has involved deposition at low temperature, followed by a high-temperature anneal to form the superconducting phase.…”