Abstract
An electroless plating bath for the preparation of perpendicular recording media was developed. It was found that the hcp structure of Co‐P is oriented normal to the film plane with the Mn codeposition into the films. First, an ammoniacal malonate‐malate bath, containing , was selected. Nickel was codeposited into the films in order to decrease the saturation magnetization, , since low is necessary to decrease the demagnetizing field. Second, effects were investigated for three factors (i.e., concentration, bath pH, and concentration) causing the c‐axis perpendicular orientation of the film properties. Optimum plating conditions for perpendicular recording media were thus determined.
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