Y. Sonobe, Y. Ikeda, et al.
Journal of Applied Physics
Modeling and read/write characteristics of coupled granular/continuous (CGC) perpendicular recording media are described. The media consists of a continuous layer with a strong in-plain exchange coupling and a granular layer with magnetically isolated grain structure. The two layers are coupled by interlayer exchange coupling. Hysteresis loop squareness approaching unity is realized in CGC samples with only a 3-6 nm continuous layer on a CoCrPt granular layer. An approximated energy calculation shows a domain-wall pinning effect and transition smoothing due to interlayer exchange coupling between the two layers. Read/write measurements for the CGC media indicate signal-to-noise ratio improvement in association with transition jitter reduction, which suggests transition smoothing. Thermal stability is improved by interlayer exchange interaction.
Y. Sonobe, Y. Ikeda, et al.
Journal of Applied Physics
S.J. Greaves, H. Muraoka, et al.
Journal of Magnetism and Magnetic Materials
S.J. Greaves, H. Muraoka, et al.
Journal of Magnetism and Magnetic Materials
Y. Sonobe, Y. Ikeda, et al.
IEEE Transactions on Magnetics