DocumentCode :
1450993
Title :
Reversal Properties of Write Head at Extremely High Density
Author :
Wang, Sumei ; Wei, Dan ; Gao, Kai-Zhong
Author_Institution :
Dept. of Mater. Sci. & Eng., Tsinghua Univ., Beijing, China
Volume :
45
Issue :
10
fYear :
2009
Firstpage :
3672
Lastpage :
3675
Abstract :
In this paper, the dynamic response of a write head, with a single pole, symmetric shields, and driven by two symmetric five-turn driving coils, is analyzed. Triangular prism cells are introduced for accurate simulation of edges with slope, and comparisons of reversal processes are made between the heads with and without smooth edges. Simulation results reveal the phase shift of averaged magnetization of pole tip versus the current is more prominent for head with smooth edges. The reversal time is in the range of 0.49-0.09 ns with steady currents 5-20 mA, respectively, for heads with smooth edges. The reversal speed of the write head increases with larger damping constant, and there is an increasing phase shift meanwhile. The thickness of the soft underlayer (SUL) affects both the write field and the phase shift.
Keywords :
damping; magnetic heads; magnetic recording; magnetic shielding; magnetisation; damping constant; magnetic recording; magnetization; phase shift; reversal properties; smooth edges; soft underlayer; steady current; symmetric five-turn driving coils; symmetric shield; triangular prism cells; write head; Damping constant; high density; reversal property; soft underlayer;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2009.2024634
Filename :
5257281
Link To Document :
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