THE EFFECTS OF SENDUST KEEPER THICKNESS, CR BREAK-LAYER THICKNESS ANDREPRODUCE BIAS ON KEEPERED MEDIA PERFORMANCE AND PULSE ASYMMETRY

Keepered media optimal sendust keeper thickness is 15 nm (2.06 memu/cm (2) MrT) in terms of amplitude, pulse width and peak detect channel pe rformance. Keeper noise is partially coherent and is larger at low den sities with minimum values for <15 nm keeper thickness. Performance im proves as Cr break layer is reduced to 2.0 nm thickness. Keepered medi a amplitude and peak position asymmetry are a function of bias and mus t be corrected to do measurements of overwrite, partial erasure and NL TS and to achieve maximum linear storage density.