Thin-film high Tc superconductors prepared by a simple flash evaporation technique

• Published in: Applied physics letters Vol. 53; no. 17; pp. 1663 - 1664
• Main Authors: OSOFSKY, M. S, LUBITZ, P, HARFORD, M. Z, SINGH, A. K, QADRI, S. B, SKELTON, E. F, ELAM, W. T, SOULEN, R. J. JR, LECHTER, W. L, WOLF, S. A
• Format: Journal Article
• Language: English
• Published: Melville, NY American Institute of Physics 24-10-1988
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Physics; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Crystal growth; Stoichiometry; Flash evaporation; Annealing; Electrical conductivity; Transition metal Compounds; Bismuth Calcium Copper Strontium Oxides Mixed; Experimental study; Lattice parameters; X ray diffraction; Texture; Inorganic compound; Thin film; Barium Calcium Copper Thallium Oxides Mixed; High temperature superconductor; Superconducting transition
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.100468

Thin films of Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O have been deposited on single- crystal MgO substrates by a simple flash evaporation technique. Small pellets of the superconducting compound were formed by standard techniques, then evaporated to completion on the MgO substrates using an electron beam. The best films show an onset of superconductivity at approximately 110 K and zero resistance by 78 K. X-ray diffraction measurements show the films to be tetragonal with nominal lattice parameters of a = 3.85 A and c = 30.66 A. The X-ray data also show the films to be highly textured with the metal-oxide planes parallel to the substrate surface. (Author)