Electrolytic Photoetching of Vitrovac 6025 for the Production of Magnetic Recording Heads

Work carried out in 1959 at the California Institute of Technology yielded a novel gold-silicon alloy with an amorphous structure’. This discovery initiated extensive research into the production of new metal-metalloid amorphous metal alloys of approximate composition T80M20; T80 represents 80 atomic per cent of one or more transition metals such as iron, nickel and cobalt, and M20 represents 20 atomic per cent of one or more of the metalloid (glass-former) elements such as boron, carbon, silicon and phosphorus.