By Topic

Theory of NRZ recording

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Aharoni, A. ; Purdue University, Lafayette, IN, USA

The width of the transition region between oppositely magnetized regions in nonreturn-to-zero (NRZ) digital recording is calculated by minimizing the energies involved, taking into account to a first approximation the interaction with the read-head. The writing process is neglected and argued to be relatively unimportant. The width is found to be in agreement with all available experimental data on pulse width when the binary digits are long (low-recording packing densities). The average field in the magnetized regions at high-packing densities is found to be rather well approximated by a field of a point dipole, thus justifying the previous calculations (which assumed such a dipole field) whose results for the maximum packing density also agree with experiment. The signal amplitude at low-recording packing densities, calculated from the same potentials, fits the experiment rather well, especially if cubic, rather than uniaxial, anisotropy is assumed. It seems that a better fit might be obtained if a better approximation is used for the interaction with read-head.

Published in:

Magnetics, IEEE Transactions on  (Volume:2 ,  Issue: 2 )