Effect of humidity on microstructure and properties of YBCO films prepared by Electron Beam Coevaporation

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• 作者：LianHong Wang (1) lianhong.wang@163.com
  YongHua Shu (1)
  Jing Fan (1)
• 关键词：YBCO – superconducting films – coevaporation
• 刊名：SCIENCE CHINA Technological Sciences
• 出版年：2012
• 出版时间：August 2012
• 年：2012
• 卷：55
• 期：8
• 页码：2291-2294
• 全文大小：1.1 MB
• 参考文献：1. Ohshima S, Shirakawa M, Kitamura K, et al. The surface resistance of YBCO thin films under a high dc magnetic field. Chinese J Phys, 2004, 42(4-II): 425–430
  2. Wang Y S, Guan X J, Zhang H Y, et al. Progress in inhomogeneity of critical current and index n value measurements on HTS tapes using contact-free method. Sci China Tech Sci, 2010, 53(8): 2239–2246
  3. Jia Y, Hua J, Crabtree G W, et al. C-axis critical current density of second-generation YBCO tapes. Supercond Sci Technol, 2010, 23(11): 115017(1–4)
  4. Kinder H, Berberich P, Prusseit W, et al. YBCO Film deposition on very large areas up to 20×20 cm2. Physica C, 1997, 282–287: 107–110
  5. Liu X Z, Tao B W, Luo A, et al. The preparation of double-sided YBCO thin films by simultaneous sputtering from single target. Thin Solid Films, 2001, 396(l–2): 225–228
  6. Hudne J, Ohlsen H, Ostling M, et al. Studies of YBa2Cu3O7?x formation in co-evaporated Y-BaF2-Cu thin film on sapphire substrates. Thin Solid Films, 1994, 247(2): 213–225
  7. Weiss F, Senateur J P, Chaudouet P, et al. YBCO film on buffered Ni RABIT substrates by pulsed injection MOCVD. Physica C, 2002, 372–376(Supp 2): 652–655
  8. Boffa V, Petrisor T, Gambardella U, et al. High-quality YBCO thin films grown by off-axis PLD geometry. IEEE T Appl Supercond, 1997, 7(2): 1189–1192
  9. Chen Y L, Mantese J V, Hamdi A H, et al. Microstructure and superconducting properties of Y-Ba-Cu-O and Yb-Ba-Cu-O thin films formed by metallorganic deposition. J Mater Res, 1989, 4(5): 1065–1071
  10. Nakagawa K, Nakayama S, Saito A, et al. Relationship between intrinsic surface resistance and critical current density of YBCO thin films with various thickness. Physica C, 2010, 470: 1361–1364
  11. Li S H, Shu Y H, Fan J. Thickness and component distributions of yttrium-titanium alloy films in electron-beam physical vapor deposition. Sci China Ser E-Tech Sci, 2008, 51(9): 1470–1482
  12. Fan J, Boyd I D, Shelton C. Monte Carlo moldeling of YBCO vapor deposition. In: Bartel T J, Gallis M A, eds. The 22nd International Symposium on Rarefied Gas Dynamics. New York: Melville, 2001. 214–221
  13. Wang L H, Shu Y H, Fan J. Study of YBCO films prepared by E-beam evaporation. Cryogenics Supercond, 2010, 38(11): 21–24
• 作者单位：1. State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190 China
• ISSN：1869-1900

文摘

YBCO superconducting films were prepared by Electron Beam Coevaporation method. All the YBCO films were annealed at 760°C in humidity range of 2.3%–9.5%. Microstructure of the YBCO thin films was analyzed by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). Superconducting properties of the YBCO films were measured by electromagnetic induction method. XRD results showed that c-axis-oriented grains existed in the YBCO films. Morphologies of the YBCO films showed that all the films had a smooth and crack-free surface. YBCO films prepared at 7.3% humidity condition showed J _c value of 4.6 MA cm?2 at 77 K in self-field.