Study of Ultra-High Debnsity Information Storage Materials

目前的项目是以高密度数据存储、特别是磁性和磁光学记录的材料科学为基础的。这项工作是与美国斯坦福大学的一组联合合作的，因为在记录介质中的纳米尺度结构的可控制性很高。同样，用高磁性的同位素材料的进一步发展必须是制造的。现在的工作被强加在上面的问题上。以下结果可能会被总结为结果：1。An ordered Coy D23エD2Pt？y thin film is found to exhibit very high magnetic anisotropy 3 x10エD17エD1erg/cc at room temperature。这篇文章是第一篇被报道的文章。An ordered CoイD23イエD2Pt？y thin film is found to exhibit very high magnetic anisotropy 3 ×10イD17イエD1erg/cc at room temperature。这篇文章是第一篇被报道的文章。磁记录媒体CoCrPtTa的热稳定性强烈依赖于激活体积。激活的体积依赖于磁场。用归档的方式减少，然后在实地增加超越协同作用。这一结果表明，谷物的磁性异向分化是一种预先确定的结果。在第5卷中，媒体上记录性能的噪音增加了激活。2013年：畸变TbFeCo电影的场依赖性，因为它在磁性记录媒体上有很大的不同。这一启示是，变态电影中的热放松机制是由一个单一的能量潜力值管理的，并与磁记录媒体的情况相比较。

The present project is concerned with materials science of high density data storage, especially magnetic and magneto-optical recordings. The work is jointly collaborated with the group of Stanford University in the USA.For furuter high density recording the controllability of nanoscale structure in a recording medium is essential. Also, further development of novel materials with high magnetic an isotropy must be made. The present work is forcused on the above issues. The followings may be summarized as the results.1. An ordered CoィイD23ィエD2Pt alloy thin film is found to exhibit very high magnetic anisotropy 3x10ィイD17ィエD1 erg/cc at room temperature. This finding is the first to be reported.2. An ordered CoィイD23ィエD2Pt alloy thin film is found to exhibit very high magnetic anisotropy 3 ×10ィイD17ィエD1 erg/cc at room temperature. This finding is the first to be reported.3. The thermal stability of magnetic recording media CoCrPtTa strongly depends on activation volume. The activation volume is dependent on magnetic field. decreasing with filed and then increases at fields beyond coercivity. This result implies that the dispersion of magnetic anisotropy of grains is predominant.4. The noise of recording performance of the above media increases with activation on volume.5. The field dependence of amorphous TbFeCo films which are being used for magneto-optical recording is very much different from that for magnetic recording media. This implies that the thermal relaxation mechanism in amorphous films is governed by a single energy potential value, as compared to the case of magnetic recording media.