Superconductivity and x-ray photoemission study of MgB2 thin films

doi:10.1088/1009-1963/11/12/315

中国物理B ›› 2002, Vol. 11 ›› Issue (12): 1300-1302.doi: 10.1088/1009-1963/11/12/315

Superconductivity and x-ray photoemission study of MgB₂ thin films

王淑芳, 周岳亮, 朱亚彬, 张芹, 谢侃, 陈正豪, 吕惠宾, 杨国桢

Laboratory of Optical Physics, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China

收稿日期:2002-08-21 修回日期:2002-09-11 出版日期:2002-12-12 发布日期:2005-06-12
基金资助:
Project supported by the State Key Programme for Basic Research of China (Grant No 1999064604).

Superconductivity and x-ray photoemission study of MgB₂ thin films

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)

Laboratory of Optical Physics, Institute of Physics and Center of Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2002-08-21 Revised:2002-09-11 Online:2002-12-12 Published:2005-06-12
Supported by:
Project supported by the State Key Programme for Basic Research of China (Grant No 1999064604).

摘要/Abstract

摘要： Highly c-axis oriented MgB₂ thin films with T_c^onset of 39.6K were fabricated by magnesium diffusing into pulsed-laser-deposited boron precursors. The estimation of critical current density J_c, 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.

Abstract: Highly c-axis oriented MgB₂ thin films with T_c^onset of 39.6K were fabricated by magnesium diffusing into pulsed-laser-deposited boron precursors. The estimation of critical current density J_c, 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.

Key words: superconductivity, x-ray photoemission, magnesium diboride

中图分类号:

74.78.Bz

79.60.Dp (Adsorbed layers and thin films) 74.25.Sv (Critical currents) 74.20.-z (Theories and models of superconducting state) 74.62.-c (Transition temperature variations, phase diagrams)

王淑芳, 周岳亮, 朱亚彬, 张芹, 谢侃, 陈正豪, 吕惠宾, 杨国桢. Superconductivity and x-ray photoemission study of MgB₂ thin films[J]. 中国物理B, 2002, 11(12): 1300-1302.

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[J]. Chinese Physics, 2002, 11(12): 1300-1302.

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Superconductivity and x-ray photoemission study of MgB₂ thin films

Superconductivity and x-ray photoemission study of MgB₂ thin films

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