Operating conditions for the production of thin coatings of ruthenium-cobalt alloys have already been achieved. The present work provides data on the electrodeposition of modulated ruthenium-cobalt alloys using a sulfate-sulfamate electrolyte and a double-current pulse plating technique. Alloy modulation was examined by glow discharge optical spectroscopy. Coulometric measurements during anodic dissolution of cobalt-ruthenium films make it possible to determine exactly the cobalt content and approximate amount of ruthenium in the films.