Hard magnetic layer, useful for electronic memories, is electrodeposited from an electrolyte containing cobalt, optionally nickel, carboxylic acid, sodium hypophosphite and ammonium sulfate

摘要

Hard magnetic layer is electrodeposited, from an electrolyte containing cobalt, optionally nickel, carboxylic acid, sodium hypophosphite and ammonium sulfate. In an electrolyte and process for electro-deposition of hard magnetic layers, the electrolyte has the composition 1.5-20 g/l Co<2+>, 0-10 g/l Ni<2+>, 20-75 g/l carboxylic acid(s) or salt(s), 10-60 g/l sodium hypophosphite and 20-100 g/l ammonium sulfate and is used at 0.1-2.0 A/dm<2> cathodic current density, 40-95 deg C and pH 7.1-8.5.