Superconductivity and x-ray photoemission study of MgB2 thin films

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: superconductivity x-ray photoemission magnesium diboride
• 年，卷（期）: 2002,（12）
• 页码范围: 1300-1302
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

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 107A/cm2 (15K, 0T), 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 49.4eV and 186.9eV, which are close to those of metallic Mg and transition-metal diborides, respectively.