What we can learn from magnetic Compton scattering: application to the determination of spin polarization
What we can learn from magnetic Compton scattering: application to the determination of spin polarization
复制标题
我们可以从磁康普顿散射中学到什么：在自旋极化测定中的应用
DOI：
10.1088/1742-6596/443/1/012011
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Duffy J
中科院分区：
文献类型：
--
作者：
Duffy J
自旋分辨电子动量密度的研究涉及所谓的磁康普顿分布的测量。这是仅对样品的自旋矩有贡献的那些电子的电子动量分布的一维投影。该技术适用于亚铁和铁磁材料。该剖面是通过高能X射线的非弹性“康普顿”散射获得的。由于来自不同原子轨道的电子具有特定的动量密度，因此通常可以确定磁性的起源。通常，解释需要使用分子轨道和能带结构方法的电子结构计算。在这里，我们强调应用该技术的费米能级自旋极化的测定，这方面的知识是重要的新型自旋电子材料的发展。
Studies of spin-resolved electron momentum densities involve the measurement of the so-called magnetic Compton profile. This is a one-dimensional projection of the electron momentum distribution of only those electrons that contribute to the spin moment of a sample. The technique is applicable to ferri-and ferromagnetic materials. The profile is obtained via the inelastic'Compton'scattering of high energy X-rays. Since electrons originating from different atomic orbitals have specific momentum densities, it is often possible to determine the origin of the magnetism present. Typically, interpretation requires the use of electronic structure calculations using molecular orbital and band structure approaches. Here, we highlight the application of the technique to the determination of the Fermi level spin polarization, the knowledge of which is important to the development of novel spintronic materials.