MAGNETIC DISK, A FABRICATION METHOD THEREOF AND A HARD DISK DRIVE APPLYING MAGNETIC DISK THERETO, CONCERNED WITH MAGNETICALLY SEPARATING MAGNETIC SUBSTANCE GRAINS AND REDUCING MAGNETIC NOISE

摘要

PURPOSE: A magnetic disk, a fabrication method thereof and a hard disk drive applying magnetic disk thereto are provided to dispose a spacer chromium layer between a stabilizing magnetic layer and an upper magnetic layer, to spread chromium inside the upper magnetic layer. CONSTITUTION: A magnetic disk(12) includes a stabilizing magnetic layer(50) located on a substrate(52). A lower layer(54) is inserted between the stabilizing magnetic layer(50) and the substrate(52) to improve an adhesion of a stabilizing material. The substrate(52) is made of an aluminum material. The stabilizing magnetic layer(50) is covered with a spacer chromium layer(56). The chromium layer(56) is covered with an upper magnetic layer(58). Chromium is spread between magnetic material grains within the upper magnetic layer(58).