2D Magnetic Mesocrystals for Bit Patterned Media
2D Magnetic Mesocrystals for Bit Patterned Media
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用于位图介质的 2D 磁性介晶
DOI：
10.1002/admi.201800997
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发表时间：
2018-11-09
影响因子：
5.4
通讯作者：
Li, Run-Wei
中科院分区：
文献类型：
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作者：
Guo, Shanshan;Xu, Feng;Li, Run-Wei
位图案化介质在满足日益增长的高信息存储密度的需求方面显示出巨大的潜力，但目前的介质制造技术比较复杂。在这里，通过纳米种子层生长和氧化物自组装方法的组合，制备了具有单分散CoFe2O4（CFO）纳米晶体的2D磁性介晶。单分散CFO纳米磁体从具有完美晶面、特定晶体取向的衬底表面突出，并且完全弛豫。系统的磁性表征，如单CFO晶体的动态悬臂梁磁强计，磁力显微镜，和超导量子干涉器件的大面积磁强计，揭示了新的倾斜磁各向异性和可切换的单畴状态。这项工作提供了一种新的方法来制造位图案化的介质与控制的材料结构简单地通过纳米种子介导的自组装方法。
Bit patterned media exhibits great potential in satisfying the increasing demand for higher information storage density, but the present media fabrication technique is complicated. Here, a 2D magnetic mesocrystal with monodisperse CoFe2O4 (CFO) nanocrystals is fabricated through a combination of nanoseeds layer growth and oxides self‐assembly method. The monodisperse CFO nanomagnets protrude from the substrate surface with perfect crystal facets, specific crystallographic orientation, and are fully relaxed. Systematic magnetic characterizations, such as dynamic cantilever magnetometry for single CFO nanocrystal, magnetic force microscopy, and superconducting quantum interference device magnetometry for large area, reveal the novel tilted magnetic anisotropy and the switchable single domain state. This work provides a new way to fabricate bit patterned media with controlled material structure simply by a nanoseeds‐mediated self‐assembly method.