Pulsed laser deposition synthesis of superconducting (Cu, C)Ba2CuOx thin films

✍ Scribed by K. Kikunaga; T. Yamamoto; Y. Tanaka; N. Kikuchi; K. Tokiwa; T. Watanabe; N. Terada

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 604 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2010.07.002

✦ Synopsis

a b s t r a c t (Cu, C)-Ba-O thin films have been deposited at low growth temperature of 450-570 °C by pulsed laser deposition method. A control of CO 2 gas pressure and the growth temperature, usage of BaCu y O x pellet target resulted in an expansion of twice c-axis length of BaCuO 2 structure (2c phase) and a significant rise of conductivity. Measurements of in-situ XPS suggest that the 2c phase should be (Cu, C)Ba 2 CuO x [(Cu, C)-1201]. The maximum temperature of onset of the superconducting transition and zero resistance state obtained so far were 60 and 47 K, respectively.