Intra- and inter-pattern non-linearities in high density magnetic recording

Intra-pattern and Inter-pattern demagnetization fields cause the appearance of Non-Linear Transition Shift (NLTS) and Hard Transition Shift (HTS). Additional timing shifts at high frequency writing reinforce both intra-pattern and inter-pattern non-linearities. A model describing interaction of the timing and the density transition shifts for a dibit transition is proposed. Experimental results indicate strong interaction between adjacent transition in series and significant oscillations of transition shift.