Peak Shift Characteristics of Ring-Type-Head and Perpendicular-Longitudinal Composite Medium System

Abstract

The peak shift characteristics of perpendicular-longitudinal composite media in combination with a ring-typehead were investigated. It was found that the composite media had excellent peak shift characteristics in the region where the underlayer-medium showed worse characteristics. In the case of the composite media, strong perpendicular magnetization of the perpendicular recording layer suppressed the unfavorable effect of the underlayer. The underlayer's magnetization had great influence on the peak shift characteristics of the composite media, especially in the higher recording region. It is suggested that the peak shift characteristics are mainly subject to the condition of perpendicular magnetic reversal formed in the composite media.