Superconductor and method for manufacturing same

A method for manufacturing a superconductor, comprising:

• forming a film on a base body by coating a solution onto the base body, the film including the solution, the solution including a trifluoroacetate, a pentafluoropropionic acid salt, and methanol, the trifluoroacetate including a REA and a REB, the pentafluoropropionic acid salt including the REB, the REA including at least one of Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu, the REB including at least one of Nd or Sm;
• a first heat treatment process of performing heat treatment of the film at a first temperature;
• a second heat treatment process of forming a first layer from the film by performing heat treatment of the film at a second temperature after the first heat treatment process, the second temperature being higher than the first temperature, the first layer having a perovskite structure;
• and
• a third heat treatment process of forming a second layer by performing heat treatment of the first layer in an atmosphere including oxygen, the second layer including REA1-xREBxBa2Cu3O7-z,
• the x being not less than 0.01 and not more than 0.40,
• the z being not less than 0.02 and not more than 0.20,
• at least one of three groups bonded to the REB included in the solution being trifluoroacetic acid.