A magnetic storage device has a magnetic layer, the magnetic crystal grains of which are separated by a nonmagnetic phase. The typical crystal grain is in the approximate shape of a sphere or an ellipsoid. The thickness of the magnetic crystal grains, which is in the direction perpendicular to the surface...http://www.google.fr/patents/US6924048?utm_source=gb-gplus-shareBrevet US6924048 - Magnetic recording medium and a magnetic storage apparatus
Magnetic recording medium and a magnetic storage apparatus