GROWTH OF A,B-AXIS ORIENTED PEROVSKITE THIN FILMS

摘要

A method, and the resulting structure, of growing a superconducting perovskite thin film (34) of, for example, YBa2Cu3O7-x. A buffer layer (32) of, for example, the perovskite PrBa2Cu3O7-y, is grown on a crystalline (001) substrate (30) under conditions which favor growth of a,b-axis oriented material. Then the YBa2Cu3O7-x layer (34) is deposited on the buffer layer (32) under changed growth conditions that favor growth of c-axis oriented material on the substrate, for example, the substrate temperature is raised by 110 DEG C. However, the buffer layer acts as a template that forces the growth of a,b-axis YBa2Cu3O7-x, whichnonetheless shows a superconducting transition temperature near that of c-axis oriented films.