Microstructural and transport properties of laser ablated LuBa2Cu3O7−δ thin films

✍ Scribed by R. Pinto; K.I. Gnanasekar; H.V. Keer; A.S. Tamhane; L.C. Gupta; R. Vijayaraghavan

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 714 KB
• Volume: 227
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90365-4

✦ Synopsis

High-quality LuBa2CuJ0,_-6 (LBCO) thin films have been grown on ( 100) LaA103 by pulsed laser deposition. Microstructural studies have indicated a high degree of c-axis orientation and an in-plane alignment. Transport measurements carried out on 10 Km wide microbridges of LBCO films have shown high critical current densities in the range 2-5 X lo6 A cm-* at 77 K. Self-field induced flux creep caused by transport currents has also been studied. However, the thickness-dependent effective microwave surface resistance, Ren, measured using a microstrip resonator technique at the X band has shown a minimum at 3000 8, indicating film degradation above 3000 A.