硫酸处理后石墨铁磁有序度的增强
Enhancement of the ferromagnetic order of graphite after sulphuric acid treatment
摘要：
研究了石墨粉和石墨片经稀硫酸处理后铁磁性的变化。我们表明，这种酸处理大大提高了原始石墨微米级粉末的铁磁性，以及在石墨片。在300 K下，在微米尺寸的薄石墨片中测得的各向异性磁电阻（AMR）幅度在酸处理后达到与多晶钴相当的值。
英文摘要：
We have studied the changes in the ferromagnetic behavior of graphite powder and graphite flakes after treatment with diluted sulphuric acid. We show that this kind of acid treatment enhances substantially the ferromagnetic magnetization of virgin graphite micrometer size powder as well as in graphite flakes. The anisotropic magnetoresistance (AMR) amplitude at 300 K measured in a micrometer size thin graphite flake after acid treatment reaches values comparable to polycrystalline cobalt.
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