Roughness development in electrodeposited soft magnetic CoNiFe films in the presence of organic additives

The effects of three additives, sodium lauryl sulfate (NaLS), saccharin (Sacc), and NaLS + Sacc, on roughness development during the electrodeposition of CoNiFe films were investigated. The characterization of these films by atomic force microscopy shows that the electrodeposits produced from NaLS containing solution result in a rough surface. The role of NaLS surfactant is to change the interfacial tension and clean non-polar species like hydrogen bubbles from the surface. In Sacc containing solution the evolution of a smooth surface is controlled by adsorbed Sacc molecule at the interface. The kinetic roughening of these deposits was investigated by dynamic scaling analysis. It was demonstrated that the roughness of CoNiFe films, obtained in the presence of NaLS + Sacc additives, was also dependent on current density, roughness of substrate, and the temperature of plating bath. Izucavan je uticaj tri aditiva, natrijum-laurilsulfata (NaLS), saharina (Sacc) i NaLS + Sacc na hrapavost povrsine CoNiFe filmova dobivenih elektrodepozicijom. Ispitivanje ovih filmova AMF mikroskopijom ukazuje na veliku hrapavost povrsine filmova dobivenih u prisustvu NaLS. Uloga NaLS surfaktanta je da menja povrsinski napon i pomaze uklanjanju mehurica vodonika sa povrsine. U rastvorima koji sadrze Sacc stvaranje glatkih povrsina je kontrolisano adsorbovanim molekulima saharina na granici faza. Dinamicka analiza je upotrebljena za uvid u kinetiku razvoja povrsine. Rezultati su pokazali da hrapavost povrsine zavisi takodje od gustine struje, hrapavosti supstrata i temperature elektrolita. .