Abstract Highly c-axis oriented MgB2 thin films with Tconset of 39.6K were fabricated by magnesium diffusing into pulsed-laser-deposited boron precursors. The estimation of critical current density Jc, using hysteresis loops and the Bean model, has given the value of 107 A/cm2 (15 K, 0 T), which is one of the highest values ever reported. The x-ray photoemission study of the MgB2 thin films has revealed that the binding energies of Mg 2p and B 1s are at 49.4 eV and 186.9 eV, which are close to those of metallic Mg and transition-metal diborides, respectively.
Received: 21 August 2002
Revised: 11 September 2002
Accepted manuscript online:
(Transition temperature variations, phase diagrams)
Fund: Project supported by the State Key Programme for Basic Research of China (Grant No 1999064604).
Cite this article:
Wang Shu-Fang (王淑芳), Zhou Yue-Liang (周岳亮), Zhu Ya-Bin (朱亚彬), Zhang Qin (张芹), Xie Kan (谢侃), Chen Zheng-Hao (陈正豪), Lü Hui-Bin (吕惠宾), Yang Guo-Zhen (杨国桢) Superconductivity and x-ray photoemission study of MgB2 thin films 2002 Chinese Physics 11 1300
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