Change of magnetic properties of autocatalytically deposited CoNiP films by electrolysis simultaneously applied

The magnetic properties of CoNiP films autocatalytically deposited from a g lycine as ligand containing solutions changed with the simultaneously appli ed electrolysis. The character of changes was found to be dependent on the ratio [Co2+]:[Ni2+], concentrations of glycine, hypophosphite and pH of sol ution. The highest values of magnetic coercivity were obtained at potential s close to -700 mV (in some investigated cases this value conforms with a m ixed potential of electroless plating) and was found to be related to the f ormation of definite size elongated crystallites. Coercivity, remanent magn etic induction and magnetic squareness of films greatly decreased at higher cathodic polarization. This decrease was determined by an excess of P in f ilms and was connected with the decrease in size of the grains. (C) 2001 El sevier Science B.V. All rights reserved.