TY - JOUR KW - Thin films KW - Ion beams KW - Morphology KW - Atomic force microscopy KW - Computer software KW - Computer simulation KW - Energy dissipation KW - Electric resistance KW - Crystal defects KW - Current voltage characteristics KW - Pinning KW - Columnar defects KW - Electronic energy loss KW - Chemical vapor deposition KW - Critical current density (superconductivity) KW - Deformation KW - Ion bombardment KW - Magnesium compounds KW - Particle accelerators AU - S.R Shinde AU - S.B Ogale AU - J Higgins AU - R.J Choudhary AU - V.N Kulkarni AU - T Venkatesan AU - H Zheng AU - Ramamoorthy Ramesh AU - A.V Pogrebnyakov AU - S.Y Xu AU - Q Li AU - X.X Xi AU - J.M Redwing AU - D Kanjilal AB - The modification in the temperature and field dependence of critical current density of high quality MgB 2 thin films, irradiated with 200 MeV Ag ion, was studied. A standard four-probe technique with a direct current source was used for transport measurements. Significant enhancement in critical current density, in a specific magnetic field range, was observed for MgB 2 films. The formation of defect clusters in high concentration is suggested to be responsible for the observed improvement in J C. BT - Applied Physics Letters DO - 10.1063/1.1687982 LA - eng M1 - 13 N1 - cited By 32 N2 - The modification in the temperature and field dependence of critical current density of high quality MgB 2 thin films, irradiated with 200 MeV Ag ion, was studied. A standard four-probe technique with a direct current source was used for transport measurements. Significant enhancement in critical current density, in a specific magnetic field range, was observed for MgB 2 films. The formation of defect clusters in high concentration is suggested to be responsible for the observed improvement in J C. PY - 2004 SP - 2352 EP - 2354 T2 - Applied Physics Letters TI - Modification of critical current density of MgB 2 films irradiated with 200 MeV Ag ions VL - 84 SN - 00036951 ER -