Oxide superconducting thin film material, oxide superconducting thin film wire, and method for manufacturing oxide superconducting thin film

An oxide superconducting thin film material comprising:

• a metal substrate having a surface with a biaxially oriented crystal orientation structure;
• an intermediate layer biaxially oriented and formed on the metal substrate;
• and
• an oxide superconducting thin film formed on the intermediate layer and composed of a RE123-based oxide superconductor represented by REBa2Cu3Oy, where RE represents a rare earth element, Ba represents barium, Cu represents copper, and O represents oxygen, wherein
• the oxide superconducting thin film includes Br (bromine),
• the oxide superconducting thin film has a deposit formed on a surface of the intermediate layer or in the oxide superconducting thin film, and
• the deposit includes a Ba2Cu3O4Br2 crystal.