Title :
Even harmonic ripple effect and demagnetizing field mapping
Author :
Xian, Rui ; Yuan, Zhi-Min ; Xiao, Pei-Ying ; Liu, Bo
Author_Institution :
Data Storage Inst., Singapore, Singapore
fDate :
7/1/2004 12:00:00 AM
Abstract :
A new phenomenon in data writing process, named "even harmonic ripple effect," has been reported and investigated in this paper. The analysis and simulation results show that this effect is due to the interpattern proximity effect on the hard transition shifts when a data pattern formed by square wave writing current at a frequency (2n+p)f is overwritten by another square wave writing current at a frequency f, where n is an integer and p is an introduced shift rate. The ripple effect can be used to measure the amount of demagnetizing field fluctuation of magnetic media in magnetic recording system.
Keywords :
demagnetisation; magnetic recording; data writing process; demagnetizing field fluctuation; demagnetizing field mapping; even harmonic ripple effect; hard transition shifts; interpattern proximity effect; magnetic media; magnetic recording system; overwriting; square wave writing current; Analytical models; Demagnetization; Fluctuations; Frequency; Grain size; Magnetic field measurement; Magnetic recording; Pattern analysis; Proximity effect; Writing; Even harmonic ripple effect; hard transition shift; interpattern proximity effect;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.832107
