ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
To fully exploit the capability of vertical head sensors, it is necessary to increase the gap immediately after the front contact region located at the air bearing surface. Because of fringing of the flux as it leaves the sensor and passes to the shields, the effective gap is less than the physical gap. An analysis has been performed using an electrical, SPICE, analog model for the field equations to determine the relationship between the change in the physical gap and the effective gap in terms of the signal decay along the sensor [A. V. Pohm, R. S. Beech, J. M. Anderson, and W. C. Black, IEEE Trans. Magn. 33, 2392 (1997)]. Three enlarged half gaps were considered: one with an abrupt increase, one with a slope of two, and one with a slope of one. The analysis considered mostly back gaps which were ten times larger than the front gaps, going from 0.1 to 1.0 μm, for example. The results show an abrupt step yields an effective slope of 0.9 and a physical step with a slope of 1 yields an effective slope of 0.75. The effective slopes are being used to more accurately model the decay of signal flux along vertical head sensors. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.370239
Permalink