• 文献标题:   MgB2 thin films grown on graphene/Ni-Mo alloy system
  • 文献类型:   Article
  • 作  者:   LINGHU KH, SONG QJ, ZHANG H, YANG QQ, ZHANG JB, WU QH, NIE RJ, DAI L, FENG QR, WANG FR
  • 作者关键词:   mgb2, graphene, superconducting rf cavity
  • 出版物名称:   PHYSICA CSUPERCONDUCTIVITY ITS APPLICATIONS
  • ISSN:   0921-4534 EI 1873-2143
  • 通讯作者地址:   Peking Univ
  • 被引频次:   0
  • DOI:   10.1016/j.physc.2015.06.001
  • 出版年:   2015

▎ 摘  要

200 nm Ni film is coated on 25 mu m thick Mo foil, and graphene is grown on the Ni-Mo system by CVD method. After the annealing process of CVD, the Ni/Mo bilayer transforms into Ni-Mo alloy, then we have successfully fabricated MgB2 films on graphene/Ni-Mo alloy system via the hybrid physical-chemical vapor deposition (HPCVD) technique. The transition temperature T-c onset is 38.25 K with a corresponding transition width of 0.75 K. The average thickness of MgB2 films is 200 nm (25% concentration B2H6). The critical current density derives from the magnetization measurement at 5 K is, j(c) (5 K, 0 T) = 9.6 +/- 106 A/cm(2). We can easily deposite MgB2 on graphene/Ni-Mo alloy system with a lower B2H6 concentration and less gas flow, which lays a good foundation for depositing MgB2 thick films. The graphene in this system is multilayer and with defects, it may act like an intermediary film for the growth of MgB2, or a carbon-doping source. (C) 2015 Elsevier B.V. All rights reserved.