A three-dimensional magnetic memory medium which comprises a substrate, a plurality of magnetic layers and a plurality of nonmagnetic layers. The magnetic layers and the nonmagnetic layers are alternately stacked one above the other on the substrate. Each magnetic layer comprises a transfer area, wherein...http://www.google.com/patents/US5103422?utm_source=gb-gplus-sharePatent US5103422 - Three-dimensional magnetic memory medium and method for initial setting thereof
