IMR, Tohoku University
@Yanwei Ma, Kazuo Watanabe, Satoshi Awaji , and Mitsuhiro Motokawa
A hot-wall-type metalorganic chemical vapor deposition (MOCVD) apparatus combined with a cryogen-free superconducting magnet was recently developed . This system allows the application of magnetic fields up to 11T for the MOCVD process. After making various improvements, we succeeded in fabricating YBa2Cu3O7 (YBCO) films on both single crystalline MgO substrates and polycrystalline Ag substrates [1]. In this presentation, the crystallinity, surface morphology, and superconducting properties of YBCO films were evaluated. The experimental results showed that the Jc of YBCO films deposited in high fields was extremely higher than that of the YBCO films in the absence of magnetic field. [1] Yanwei Ma et al., Jpn. J. Appl. Phys. 39 (2000) L726.