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Micromagnetics of perpendicular write heads with extremely small pole tip dimensions.
- Source :
-
Journal of Applied Physics . 5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p6833. 3p. 2 Diagrams, 3 Graphs. - Publication Year :
- 2002
-
Abstract
- A three-dimensional micromagnetic model has been developed to study single pole write heads with soft magnetic underlayer (SUL) for perpendicular recording at extremely small track widths. The study points out that at any practical ABS-to-SUL spacing, the maximum head field within the recording media at deep submicron track width and pole-tip thickness becomes significantly smaller than the ideal value of 4πM[sub s]. Head field gradient in the medium also degrades with decreasing track width. Maintaining the conventional design, a significantly large remanent head field develops for track width below 100 nm, presenting danger of erasing previously recorded bits. The origin of the large remanent head field is the failure for a pole tip to reach a completely demagnetized state due to the overwhelming ferromagnetic exchange energy at the deep submicron pole-tip dimensions. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MAGNETIC materials
*PHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 91
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 6667182
- Full Text :
- https://doi.org/10.1063/1.1452662