Resonant Raman characterisation of ultra-thin nano-protective carbon layers for magnetic storage devices
Resonant Raman characterisation of ultra-thin nano-protective carbon layers for magnetic storage devices
复制标题
DOI：
10.1016/s0257-8972(03)00602-9
复制
发表时间：
2003-09
影响因子：
5.4
通讯作者：
M. Gradowski;A. Ferrari;R. Ohr;B. Jacoby;H. Hilgers;H.-H. Schneider-H.;H. Adrian
中科院分区：
文献类型：
--
作者：
M. Gradowski;A. Ferrari;R. Ohr;B. Jacoby;H. Hilgers;H.-H. Schneider-H.;H. Adrian
碳薄膜是一种非常重要的保护涂层，广泛应用于磁存储器件等领域。感兴趣的关键参数是sp3分数，因为它控制着薄膜的机械性能。可见拉曼光谱是一种非常流行的测定碳键的技术。然而，可见光拉曼光谱主要取决于sp2位的结构和聚类。这可能导致不同样品的拉曼光谱看起来相似，尽管具有不同的结构。因此，不能单独使用可见拉曼来推导sp3含量。在这里，我们通过对两个波长（514和244 nm）的拉曼光谱的综合研究来监测碳键。我们展示了G峰色散是如何研究碳样品的一个非常有用的参数，我们认可它作为生产线表征工具。分散度与无序程度成正比，因此可以区分石墨碳和类金刚石碳。
Carbon thin films are very important as protective coatings for a wide range of applications such as magnetic storage devices. The key parameter of interest is the sp3fraction, since it controls the mechanical properties of the film. Visible Raman spectroscopy is a very popular technique to determine the carbon bonding. However, the visible Raman spectra mainly depend on the configuration and clustering of the sp2sites. This can result in the Raman spectra of different samples looking similar albeit having a different structure. Thus, visible Raman alone cannot be used to derive the sp3content. Here we monitor the carbon bonding by using a combined study of Raman spectra taken at two wavelengths (514 and 244 nm). We show how the G peak dispersion is a very useful parameter to investigate the carbon samples and we endorse it as a production-line characterisation tool. The dispersion is proportional to the degree of disorder, thus making it possible to distinguish between graphitic and diamond-like carbon.