Studying the initial stages of film electrodeposition of magnetic cobalt-tungsten alloys

Initial stages of magnetic film electrodeposition by recording potentiodynamic polarization and jc,t-curves, determination of surface structure of electrolytically deposited films by the method of XPS and study of thin coating properties have been considered. It is shown that at initial stage of electrodeposition of magnetic Co-W-films a sharp decrease in cathode process rate and formation of Co(OH)2, WO3 and/or WO42- occur on Cu-cathode surface. Electrodeposition of metallic magnetic Co-W-alloy, consisting of Co, W and containing basic compounds of co-deposited metals, takes place after a certain time period depending on deposition Ec. 6 refs.; 3 figs