Electrochimica Acta, Vol.52, No.20, 6089-6096, 2007
Electrodeposition of magnetic CoPd thin films: Influence of plating condition
The manufacture and properties evaluation of Co-based thin film alloys are extensively studied because of their magnetic properties that make them a critical element in many different applications and devices. Therefore the electrodeposition of CoPd alloy thin films was studied from a chloride bath containing glycine as additive. The cobalt content in the CoPd deposits varied from 6.4 to 94.0 at% by controlling the pH and [Co2+]/[Pd2+] ratio in the bath. Current efficiencies were independent of the solution pH and bath composition. The morphology of the deposits depended on the applied current density: current densities higher than 50 mA cm(-2) resulted in deposits with a typical cauliflower morphology. For current densities lower than 25 mA cm(-2) cracks was observed. The XRD measurements showed that all CoPd alloys were amorphous. The magnetic properties for CoPd alloys revealed that the coercivity (H-c) values ranged from 84 up to 555 Oe and the magnetic saturation (M-s) from 0 to 1.73 T. (c) 2007 Published by Elsevier Ltd.