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arXiv 0807.1805cond-mat.mtrl-sci
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透射电镜倒易空间图的定量磁信息

Quantitative magnetic information from reciprocal space maps in transmission electron microscopy

Hans Lidbaum, Ján Rusz, Andreas Liebig, Björgvin Hjörvarsson, Peter M. Oppeneer, Ernesto Coronel, Olle Eriksson, Klaus Leifer

摘要:

磁性材料表征中最具挑战性的问题之一是在纳米尺度上获得定量分析。在这里,我们描述了如何使用透射电子显微镜(TEM)的电磁圆二色性(EMCD)测量可以用于该目的,利用倒易空间映射。应用EMCD求和规则,得到了Fe的轨道自旋矩比为$m_L/m_S=0.08 \pm 0.01$,这与普遍接受的值是一致的.因此,我们建立EMCD作为一种定量元素的具体技术,磁性研究,使用广泛使用的仪器具有优越的空间分辨率。

英文摘要:

One of the most challenging issues in the characterization of magnetic materials is to obtain quantitative analysis on the nanometer scale. Here we describe how electron magnetic circular dichroism (EMCD) measurements using the transmission electron microscope (TEM) can be used for that purpose, utilizing reciprocal space maps. Applying the EMCD sum rules, an orbital to spin moment ratio of $m_L/m_S=0.08 \pm 0.01$ is obtained for Fe, which is consistent with the commonly accepted value. Hence, we establish EMCD as a quantitative element specific technique for magnetic studies, using a widely available instrument with superior spatial resolution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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