r Killel Disks

Perpendicular magnetic recording is a promising method for theachievementof higher recording densities.The magneticand crystal orientationalproperties of double-layer rigiddisks for perpendicular magneticrecording were studied*The coerciveforce distributionin theMo-Cu- Permalloy underlayer was investigated as a functionof thesputtering gas pressure. At optimum Ar gas pressure, good uniformity of the coerciveforce distributionwas obtained.Even in double-layer media,the crystalorientationof the Co-Cr layeris influencedbythe characteristicsand thicknessof the treatedsurfacelayerof the