Superconductivity and microstructure of epitaxial (Tl,Bi)Sr1.6Ba0.4Ca2Cu3O9−δ thin films

✍ Scribed by C.A. Wang; Z.F. Ren; J.H. Wang; D.J. Miller

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 593 KB
• Volume: 245
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(95)00083-6

✦ Synopsis

Epitaxial (TI,Bi)Srl.6Bao.4Ca2Cu309_ 8 ((T1,Bi)-1223) thin films on (100) single crystal LamlO 3 substrates were successfully synthesized by a two-step procedure. The (TI,Bi)-1223 phase development in both air and argon was systematically investigated by X-ray diffraction. The microstructure and epitaxial relationship between films and substrates were measured by X-ray ~b scan, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The DC resistance versus temperature transition, zero-field-cooled (ZFC) and field-cooled (FC) magnetization transition, hysteresis curve, and transport critical current density were measured. The zero-resistance transition temperature was 107 K, and the critical current density at 77 K and zero field was higher than 2 × 106 A/em 2. (TI,Bi)-1223 films have good flux-pinning properties as shown by the slow decrease of the critical current density in an external magnetic field.