CUED Publications database

Fabrication and properties of TBCCO films via air-atomising spray deposition of thallium-free precursors

Su, LY and Grovenor, CRM and Goringe, MJ and Dewhurst, CD and Cardwell, DA and Jenkins, R and Jones, H (1994) Fabrication and properties of TBCCO films via air-atomising spray deposition of thallium-free precursors. Physica C: Superconductivity and its Applications, 229. pp. 70-78. ISSN 0921-4534

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Abstract

The high-field properties of polycrystalline superconducting Tl-Ba-Ca-Cu-O films fabricated by the incorporation of thallium vapour into air-atomised Ba-Ca-Cu-O precursors are described. Thick films with Tc values in the range 106-111 K have been prepared on polycrystalline yttria-stabilised zirconia substrates. The surface morphology, crystal structure and composition of the films are related to their high-field transport and magnetisation properties. Typical 10 mm × 9 mm films show Jc values > 1 × 104 A/cm2 at 77 K (0 T). The best film has a Jc = 1.3 × 104 A/cm2 (Ic = 3.6 A) at 77 K (0 T). Films prepared on 26 mm × 9 mm substrates show typical large-area Jc values > 0.5 × 104 A/cm2 (77 K, 0 T). A square planar specimen of dimensions 4.3 mm × 4.3 mm exhibited magnetisation Jc values = 1.2 × 105 A/cm2 at 4.2 K (0.1 T), 9.3 × 104 A/cm2 at 10 K (0.1 T), 3.3 × 104 A/cm2 at 4 K (8 T), and 1.6 × 104 A/cm2 at 10 K (8 T).

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:40
Last Modified: 17 Dec 2014 19:02
DOI: 10.1016/0921-4534(94)90814-1