Abstract
The role of complexing agents in electroless plating baths on the properties of Co alloy films was studied with a view to obtain perpendicular magnetic anisotropy films. The increase in malonate concentration resulted in an increase in saturation magnetization, Ms. The perpendicular anisotropy energy, Ku, reached maximum at 0.6mol dm-3 malonate, while the half-breadth of the rocking curve for hcpCo (002) plane, ΔΘ50, reached minimum at 0.3mol dm-3. An increase in tartrate concentration sharply decreased the Ms value and at low additive concentrations increased the Ku value abruptly from negative to positive. The maximum Ku and minimum ΔΘ50 were obtained at 0.2mol dm-3 tartrate. The succinate improved only the ΔΘ50, reaching a minimum at 0.3mol dm-3 succinate. The above effects of the complexing agents on magnetic properties were explained by changes in the composition of the films, and the merits of mixed complexing agents in the plating bath were discussed on the basis of the results obtained.
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