Application of ultra-high energy hollow cathode helium–silver laser (224.3 nm) as Jc’s, grain size surface's promoter for Ir-optimally doped-Mg0.94Ir0.06B2 superconductors.

For the first time high energy Helium–Silver laser which belongs to the category of metal-vapor lasers applied as microstructure promoter for optimally Ir-doped-MgB 2 sample. The Ir-optimally doped-Mg 0.94 Ir 0.06 B 2 superconducting sample was selected from previously published article for one of authors themselves. The samples were irradiated by a three different doses 1, 2 and 3 h from an ultrahigh energy He–Ag-Laser with average power of 103 W/cm 2 at distance of 3 cm. Superconducting measurements and micro-structural features were investigated as function of He–Ag Laser irradiation doses. Results indicated that irradiations via an ultrahigh energy He–Ag-Laser promoted grains to lower sizes and consequently measured J c ’s values enhanced and increased. Furthermore Tc-offsets for all irradiated samples are better than non-irradiated Mg 0.94 Ir 0.06 B 2 . [ABSTRACT FROM AUTHOR]