Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834653 | Journal of Magnetism and Magnetic Materials | 2005 | 5 Pages |
Abstract
Granular-type FePt perpendicular magnetic recording media with (0 0 1)-texture, obtained by annealing FePt/MgO multilayer films, are fabricated onto 2.5-in glass discs. For the sake of spin-stand testing, the coercivity of FePt films is carefully modulated by controlling the annealing conditions. With annealing, exchange coupling between FePt grains is decreased, indicated by the reductions in α value and activation volume. FePt ordering process is dependent on initial FePt/MgO multilayer structures, which governs the optimum annealing condition regarding coercivities and α(=4Ï(dM/dH)H=Hc). The SNR ratio exhibits a sensitive dependence on initial FePt/MgO multilayer structures as well as annealing conditions.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Takao Suzuki, Zhengang Zhang, Amarendra K. Singh, Jinhua Yin, A. Perumal, Hiroshi Osawa,