MgB2 thick films via screen printing

We report the fabrication of MgB₂ thick films using a simple screen printing method. The substrates investigated were mono-crystalline Al₂O₃, LaAlO₃, MgO, ZrO, SrTiO₃, Si as well as steel. The dense, polycrystalline MgB₂ films consisted of crystallites with longest dimensions of about 100 nm. No texturing was observed. The transition temperatures T_c(0) varied between 34 and 36 K with transition widths smaller than 2 K. The critical current densities depended only modestly on the external field. At 6 T critical current densities of 1 × 10⁸ A/m² could be measured at 10 K.