| Summary: | Electrodeposition of metals and alloys may contain one or more organic or inorganic additives. Additives it affects the surface morphology, grainsize and crystal structure of the thin film coatings. In this study, CoNi alloy thin film coatings were produced by electrodeposition without additives and using additives (organic coumarin and thiourea). CoNi alloy thin film coating produced without additional additive; It was found that the crystal structure was face centered cubic (fcc) and the cobalt content of the coating was 67.94%. When coumarin was added to the bath composition, cobalt in the film content decreased to 43.82%, decreased to 34.33% when thiourea was added, and both films showed amorphous properties. The magnetic field applied was changed between -75000 Oe to +75000 Oe, magnetization values were measured and hysteresis curves were obtained. It was seen that the additives had a great effect on the amount of matter, crystal structure and magnetic properties in the alloy film.
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