Method of enhancing the c-axis perpendicular orientation of barium hexaferrite thin films and barium hexaferrite thin film recording media produced thereby

摘要

A method of making c-axis perpendicularly oriented barium hexaferrite thin films by the crystallization of amorphous barium hexaferrite on a platinum underlayer is provided. Using a thin underlayer of platinum, barium hexaferrite films can be deposited by conventional rf diode or magnetron sputtering. Such deposition may be performed at room temperature, after which excellent c-axis perpendicular orientation can be achieved by rapid ex-situ annealing. The c-axis perpendicular orientation can also be achieved through in- situ annealing.