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The microstructure of GdBa 2 Cu 3 O 7− δ   based on superconducting tapes with BaSnO 3  and BaZrO 3  artificial pinning centers formed by high-rate pulse laser deposition in SuperOx Japan was studied by scanning/transmission electron microscopy. The artificial pinning centers have adopted columnar morphology with average diameter of about 8 nm (BaSnO 3 -doped sample) and 6.5 nm (BaZrO 3 -doped sample) and density of 500  μ m −2  for the both samples. The average length of the BaSnO 3  nanocolumns is about two times higher than the BaZrO 3  nanocolumns. The angular dependences of critical current in magnetic field up to 1 Tesla at 77 and 65 K have been obtained. The critical current and its anisotropy depend on artificial pinning centers presence and their type. The angular dependence of resistivity in the field up to 9 Tesla was also studied and discussed.

Microstructure and superconducting properties of high-rate PLD-derived GdBa2Cu3O7−δ coated conductors with BaSnO3 and BaZrO3 pinning centers