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 10(7) A/cm(2) (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 49.4 eV and 186.9 eV, which are close to those of metallic Mg and transition-metal diborides, respectively.
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