X-ray resonant exchange scattering: Polarization dependence and correlation functions
X-ray resonant exchange scattering: Polarization dependence and correlation functions
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DOI：
10.1107/s0108767395012670
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发表时间：
1996-03-01
期刊：
影响因子：
--
通讯作者：
McMorrow, DF
中科院分区：
文献类型：
--
作者：
Hill, JP;McMorrow, DF
X射线共振交换散射的横截面重新制定的线性偏振状态垂直和平行的散射平面，特别适合于同步X射线衍射实验的基础。明确的极化依赖性的条款计算的电偶极子和四极的贡献。这个表达式，反过来，被重写在一个正交的基础上突出的横截面上的磁矩的每个组件的依赖。这具有提供横截面的经验有用的表达式的益处。计算了几种简单磁结构的衍射花样，最后导出了在各谐振谐波下测得的相关函数。
The cross section for X-ray resonant exchange scattering is reformulated in terms of linear polarization states perpendicular and parallel to the scattering plane, a basis particularly well suited to synchrotron X-ray diffraction experiments. The explicit polarization dependence of the terms is calculated for the electric dipole and quadrupole contributions. This expression, in turn, is rewritten in an orthonormal basis to highlight the dependence of the cross section on each component of the magnetic moment. This has the benefit of providing an empirically useful expression for the cross section. Diffraction patterns from a few simple magnetic structures are calculated Finally, the correlation function measured at each resonant harmonic is derived.