Abstract
An inductive head geometry without gap nulls for perpendicular magnetic recording has been modeled theoretically and experimentally. In particular, the field produced by two infinitely long and current-carrying strips placed between two highly permeable regions has been calculated. For this special geometry, this stripline model produces a sawtooth field profile for which the Fourier transform shows a very gradual decay with decreasing wavelength without nulls. The spectral sensitivity function for the strip structure is compared to that of a single-pole head. It is anticipated that this high-efficiency read transducer can be used for perpendicular magnetic recording at shorter wavelengths than single-pole-type heads that do show gap nulls. >
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