Abstract
Recording nonlinear transition shift (NLTS) and amplitude variation (NLAV) in perpendicular recording with thin-film media and a ring head were investigated. The NLTS in single layer perpendicular media was closely correlated to the medium parameters and recording conditions. A certain condition such as thinner medium with smaller residual magnetization can provide the NLTS smaller than that in longitudinal recording medium. Although direction of the NLTS was the same as that for longitudinal one, amplitude enhancement was observed at higher recording densities. Improvement in the nonlinear distortion has been made by introducing a small gap length recording head.
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