Thin metallic films for high-density digital recording

Three different methods, electrodeposition, autocatalytic deposition, and vacuum deposition, by which thin metal films may be made are described. They have a combination of magnetic characteristics which should make them well suited to the purpose of high density recording. It is concluded that the factors which are primarily responsible for the superior recording performance of these films when compared with the conventional particulate coatings are their thinness and their high coercivity.