Saturation effects on read/write characteristics of asymmetric ring head

Abstract

Asymmetric head field profiles, flux line distribution and the corresponding spectral response functions, etc., have been calculated for linear core with constant permeability and nonlinear core with B-H loop based on finite element analysis. The inclination angles range from 0" to 75" have been considered. It is shown that beyond some inclination angles the field intensity based on Schwartz-Christoffel (S.. C.) transformation calculation is generally overestimated, the signal level too high by up to 1-to-2 orders of magnitude, compared to those of the nonlinear results depending on sharpness of the head considered. Numerically, the error incured in the head field calculcation in linear core is less than 10% up to 45" inclinations, while the corresponding S.-C. results is generally 2 45% for the mmf equal to 0.112 A-T considered. Details of results will be analyzed and discussed.