The E–J characteristics of MgB2 thin film prepared by electron beam evaporation were investigated. The film had a fairly higher TC of 35K and JC of 0.48 MA/cm2 at 20K and 1T among as-grown MgB2 films prepared by various methods. The E–J characteristics at various temperatures and magnetic fields could be described by the percolation transition model. The pinning parameters and the distribution of pinning forces of the MgB2 thin film were estimated. It was found that the MgB2 thin film had the uniform distribution of pinning forces by grain boundaries.

The E–J Characteristics of MgB2 Thin Film Prepared by Electron Beam Evaporation Method. M.Haruta, T.Fujiyoshi, T.Sueyoshi, K.Miyahara, T.Doi, H.Kitaguchi: Physica C, 2005, 426-431[1], 174-8