Fabrication of Ferrite Nanodots by using Self-Assembled Nanostructural Underlayer and Their Application to Ultrahigh Density Magnetic Recording Media

点击翻译按钮获取中文摘要

The fabrication of ferrite nanodots was studied without the use of conventional lithographic techniques and patterning masks. Self-assembled Au nanodots were formed via sputtering and used as the underlayer for the ferrite film. Subsequently, hexagonal ferrite, SrFe_12O_19, was sputtered on the Au nanodots, resulting in an SrFe_12O_19/Au sample. Self-assembled SrFe_12O_19nanodots were obtained. The morphology of the Au nanodot underlayer acted as a template for the SrFe_12O_19 film, such that the self-assembled SrFe_12O_19 nanodots were formed. In addition, the fabrication of the SrFe_12O_19film on the Au nanodots induced the down-sizing ofthe magnetic domain structures of SrFe_12O_19 to the nanoscale. Importantly, although the nanodots showed nanometric magnetic domains, a sufficient magnetization magnitude in the SrFe_12O_19nanodots was revealed.