Relationship Between Head Design and Media Remanent Magnetization in Perpendicular Magnetic Recording

This paper presents micromagnetic modeling results in a perpendicular magnetic recording, which consists of a single-pole head and double-layered media. To know the inplane head field contribution, the relationship between applied angular field and media remanence is studied, and we propose a perpen...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2007-02, Vol.43 (2), p.594-599
Main Authors: Takano, K., Sakai, M., Smyth, J., Dovek, M.
Format: Article
Language:English
Subjects:
Assessments
Bands
Coils
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Footprints
Land mobile radio
Magnetic flux
Magnetic heads
Magnetic recording
Magnetic recording head
Magnetism
Magnetization
Materials science
Media
micromagnetic modeling
Micromagnetics
Other topics in materials science
parallel finite-element method
Perpendicular magnetic recording
Physics
Remanence
Saturation magnetization
Signal to noise ratio
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Summary:This paper presents micromagnetic modeling results in a perpendicular magnetic recording, which consists of a single-pole head and double-layered media. To know the inplane head field contribution, the relationship between applied angular field and media remanence is studied, and we propose a perpendicular corresponding field for the head field assessment, which can explain media remanence as well such as the main-pole footprint on the media. The shielded-pole/single-coil head shows the best signal-to-noise ratio but the overwrite performance is somewhat poorer than monopole heads, with a large positive to negative head field, which implies a large field gradient. Although the shielded-pole head has smaller erase bands with straight transitions, it can cause trailing-shield-related erasure by the negative field under the high write current input in the single-coil design
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.888197