Abstract
Higher vertical coercivity of Co-Cr film is needed in order to obtain highr reproduced output. In this paper, we report how to obtain high vertical coercivity of Co-Cr film using PET film as the substrate. A low degree of crystal orientation in Co-Cr film yields a high vertical coercivity of the Co-Cr film. In double layer media, crystal orientation of Co-Cr layer is changed with that of permalloy underlayer. A high reproduced output was obtained up to 100 kBPI using the Co-Cr/permalloy double layer media with high vertical coercivity in the Co-Cr layer and a single-pole head. The inclination of the easy axis in a simple magnetic wall motion model or a rotation model cannot explain the increase in the vertical coercivity. The degradation of the orientation of the Co-Cr film may increase the Cr segregation in Co-Cr film, and then its vertical coercivity is increased.
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