Ultra high density magnetic recording media with self-assembly prepared nano-structured substrate for thermally assisted recording

为了估算近场光学头热辅助记录中的记录过程，我们对FePT孤立颗粒进行了模型模拟。我们可以验证一个FePT颗粒的磁化强度是反向的。采用快速热退火法在两种纳米结构的衬底上制备了FePt或FeCuPt颗粒。采用聚合物胶束技术制备了周期性为14 nm的纳米Dent阵列基板。另一种是用浸渍法制备的直径为18 nm的自组装球形二氧化硅颗粒。通过使用这些衬底，成功地减小了FeCuPT颗粒的平均直径，并显著提高了颗粒面密度。

We performed model simulations of FePt isolated grains, for estimating recording process in thermally assisted recording with near field optical head. We could verify the magnetization of one FePt grain was reversed. FePt or FeCuPt particles were fabricated by rapid thermal annealing method on two kinds of nano-structured substrates. Nano-Dent Array substrate with periodicity of 14 nm was prepared by the polymer micelles technique. The other is Self-Assembled spherical small Silica Particles with diameter of 18 nm which was fabricated by the dip coating method. By utilizing those substrates, average diameter of FeCuPt particles was successfully reduced and areal density of particles was drastically increased.