Patent ID: 6893542

Claim:
A method of forming a magnetic thin film having a multilayer magnetic superlattice structure, said multilayer magnetic superlattice structure having a perpendicular magnetic coercivity of from about 5,000 to about 10,000 Oe and comprising a stacked plurality of magnetic/non-magnetic layer pairs, said method comprising the steps of: (a) providing a non-magnetic substrate having a surface for deposition thereon; and (b) providing a pair of sputtering targets having respective sputtering surfaces comprised of the materials of said magnetic and non-magnetic layers, said sputtering surface of each of said targets being positioned from about 0.5 to about 1.5 inches away from said substrate surface in an atmosphere containing at least one of Kr and Xe sputtering gases at a pressure of from about 5 to about 15 mTorr; and (c) forming said stacked plurality of magnetic/non-magnetic layer pairs comprising said multilayer magnetic superlattice structure on said substrate surface by applying a sputtering power density of from about 20 to about 40 W/in 2 to each of said sputtering surfaces.