TmBa₂Cu₃O_7-x superconducting thin films grown by pulsed laser deposition

TmBa₂Cu₃O_7-x films which is one of the (Rare earth)Ba₂Cu₃O_7-x high temperature superconductors with small ionic radius of rare earth element, were deposited on STO (100) single crystal substrates and Y₂O₃/YSZ/CeO ₂ buffered metal substrates by pulsed laser deposition. The Jc (77 K) and the value of onset T_C of TmBCO thin film on STO substrate was 4.5 MA/cm² and 86 K, respectively. The J_C of TmBCO coated conductor on metal substrate was 1 MA/cm₂. In-field property measurement was carried out at temperatures between 10 K and 77 K in magnetic filed up to 6 T in PPMS system. This is the first report, to the best of our knowledge, of TmBCO thin films and coated conductors with TmBCO film as the superconducting layer which have critical current densities at 77 K of 4.5 MA/cm² and 1 MA/cm², respectively. The superconducting properties of TmBCO films and the possibility of using TmBCO film as the superconducting layer of the HTS coated conductor, were investigated.