Deposition of MgB₂ Superconducting Films on Different Metal Substrates

By a method of hybrid physical-chemical vapour deposition (HPCVD) on three metal substrates of stainless steel, copper and niobium, we deposit MgB₂ superconducting films over 1μm thickness. All of them have zero resistance temperatures T_C(0)>36K and critical current densities J_C (10K, 0T)
>10⁶A/cm². Meanwhile, in the bending test, all the MgB₂ superconducting films adhere strongly to the metal substrates without peeling off. Therefore, the MgB₂ superconducting films supplied by the HPCVD method exhibit preferable electrical, magnetic and mechanical properties, and have potential
applications in future.