Effect of the Dimensions of a Stepped-Pole Writer on Side Erasure and Recording Performance

Micromagnetic simulations are used to investigate side erasure as a function of write transducer geometry for shingled recording on a non-oriented barium-ferrite particulate tape media without a soft-underlayer. A ring-type writer with a short stepped pole is shown to produce very little transition...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2013-07, Vol.49 (7), p.3733-3736
Main Authors: Jubert, P.-O., Rothuizen, H. E., Lantz, M. A.
Format: Article
Language:English
Subjects:
Analytical models
Atmospheric modeling
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Finite element analysis
Geometry
Magnetic heads
magnetic tape recording
Magnetism
Materials science
Media
micromagnetic simulations
Micromagnetics
Other topics in materials science
Physics
side track erasure
side writing
Writers
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Summary:Micromagnetic simulations are used to investigate side erasure as a function of write transducer geometry for shingled recording on a non-oriented barium-ferrite particulate tape media without a soft-underlayer. A ring-type writer with a short stepped pole is shown to produce very little transition curvature compared to conventional writers and to almost eliminate the erase band at the shingled track edge. In addition, the effect of the stepped pole on side erasure is found to be essentially independent of the writer gap size. However, the dimensions of the stepped pole do affect the system recording performance and should not be selected arbitrarily. We find that intermediate stepped-pole lengths produce smaller broad-band signal-to-noise ratio (BB-SNR) than a conventional writer, or require much larger deep-gap fields, whereas writers with short stepped poles (typically below 100 nm) provide more than 1 dB BB-SNR uplift at 200 kfci for only a moderate increase of writer deep-gap field. Finally, we find that the effect of the stepped pole on write performance also depends on the writer gap size.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2013.2240268