Superconducting Bi-Sr-Ca-Cu-O thin films grown by metalorganic chemical vapor deposition at different temperatures

• Published in: Japanese Journal of Applied Physics 1989-09, Vol.28 (9), p.L1578-L1580
• Main Authors: NATORI, K, YOSHIZAWA, S, HOSHINO, J, KUKIMOTO, H
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Physics; Solid surfaces and solid-solid interfaces; Surface and interface dynamics and vibrations; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/jjap.28.l1578

Superconducting Bi-Sr-Ca-Cu-O thin films have been prepared on MgO substrates by metalorganic chemical vapor deposition using triphenylbismuth and β-diketonates of Sr, Ca and Cu as source materials. Superconducting properties, surface morphology and crystallinity of the as-deposited films are largely dependent on growth temperature. When the substrate temperature is at 800°C and over, as-deposited films show high c -axis orientation and zero resistance over 70 K. The best results to date, obtained from a film grown at 800°C show the T c onset at 110 K and zero resistance at about 80 K. On the other hand, as the substrate temperature decreases below 800°C, the temperature exhibiting zero resistance and X-ray diffraction intensity are rapidly reduced.