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Domain edge formation and jitter characteristics in thermomagnetic recording with magnetic field modulation

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3 Author(s)
Cheng, D.C. ; IBM Res. Div., San Jose, CA, USA ; McDaniel, T.W. ; Davis, C.R.

The role of the dynamics of the magnetic bias field in field modulation thermomagnetic recording has been studied experimentally and through computer simulation. Using a continuous-wave, focused laser to heat a magnetooptic recording medium, the magnitude and the spatial gradient of the modulated bias field were varied, and the behavior of medium noise and jitter in magnetooptic recording was measured. The experimental measurements yielded a universal curve for the relation between signal pulse jitter and the spatial gradient of the recording bias field. Micromagnetics simulations provided insight into the connection between bias field magnitude and its spatial gradient and the degree of domain wall irregularity in recorded marks

Published in:

Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 5 )

Date of Publication:

Sep 1990

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