Title :
Direct overwriting and super resolution using exchange-coupled magnetic multilayer disks
Author :
Kaneko, Masahiko
Author_Institution :
Sony Corp., Tokyo, Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
The spin structure and stable condition for the interface magnetic wall in magnetic multilayers have been investigated. The value of the interface wall energy is optimized on the basis of the calculation for application to overwriting by light intensity modulation and magnetically induced superresolution. Direct overwriting by light intensity modulation is made possible by using magnetic triple layers with a power margin of ±30%, a linear density of 0.8 μm/b, and a track pitch of 1.4 μm. Superresolution by using magnetic quadri-layers enables a linear density of 0.3 μm/b, which is more than three times higher than the density for current magnetooptical disks
Keywords :
exchange interactions (electron); magnetic interface phenomena; magnetic multilayers; magneto-optical recording; optical modulation; direct overwriting; exchange-coupled magnetic multilayer disks; interface magnetic wall; interface wall energy; light intensity modulation; linear density; magnetic multilayers; magnetic quadri-layers; magnetic triple layers; magnetically induced superresolution; magnetooptical disks; power margin; spin structure; stable condition; super resolution; track pitch; Intensity modulation; Magnetic anisotropy; Magnetic fields; Magnetic films; Magnetic multilayers; Optical films; Optical modulation; Optical recording; Perpendicular magnetic anisotropy; Writing;
Journal_Title :
Magnetics, IEEE Transactions on
