DocumentCode :
1041811
Title :
An analysis of recording demagnetization
Author :
Morrison, John R.
Author_Institution :
Micro-Dit Corporation, Burlington, Mass.
Volume :
5
Issue :
4
fYear :
1969
fDate :
12/1/1969 12:00:00 AM
Firstpage :
949
Lastpage :
954
Abstract :
Current investigators are devoting considerable effort to the analysis of self- and adjacent bit demagnetization. However, it is shown in this paper that recording demagnetization degrades and limits digital recording to a greater extent than any other factor. Recording demagnetization reflected in the nonlinearity of the write process is the prime cause of pulse asymmetry. The nonlinear head field contour distribution results in the magnetization discontinuity in the transition zone being asymmetrical and becoming more asymmetrical as the write current increases beyond saturation. At high bit densities, recording demagnetization becomes so severe that only transition zones are recorded on the media, leading to a sinusoidal magnetization distribution. It is also shown that the manufacturing process of particulate media can introduce several adverse conditions which will affect recording demagnetization.
Keywords :
Demagnetization; Digital recording; Magnetic field measurement; Magnetic heads; Magnetic recording; Magnetic switching; Magnetization; Switches; Transducers; Writing;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1969.1066667
Filename :
1066667
Link To Document :
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