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Calculation of exact head and image fields of recording heads by conformal mapping

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2 Author(s)
Yang, Jyh Shinn ; Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan ; Huei Li Huang

An exact conformal mapping calculation is carried out, which maps the entire upper edge of an idealized ring head and a symmetric thin-film head in the complex z plane to the real axis of the complex t plane, and uses the slotted-plane approximation to obtain the inverse mapping function t(z). The latter is used to calculate not only the head fields of a given geometry, but also the kernal function to evaluate the total demagnetization field of the interaction head-media system including the media self-demagnetization and the image field induced on the head poles. The total demagnetization field contours for a single-bit arctangent transition and a dibit biquadratic transition corresponding to various head configurations have been obtained and their physical meaning elaborated on

Published in:

Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 3 )