MAGNETIC-PROPERTIES OF NICKEL-PHOSPHORUS FILMS PREPARED BY ELECTROLESS PLATING WITH ELECTROLYSIS

Changes in the magnetic properties of nickel phosphorous films fabrica ted by electroless plating with simultaneous electrolysis were studied . The saturation magnetization decreased with potentiostatic cathodic polarization. This was due to an increase in the phosphorous content o f the films upon the application of electrolysis. No distinct change w as observed in the coercivity and crystallinity. The nickel phosphorou s films formed by this process seemed to have less segregated structur e compared with those formed by electroless plating. Saturation magnet ization also changed upon the application of a pulsating current. The simultaneous application of electrolysis is, therefore, very effective in controlling the magnetic properties of nickel phosphorous films.