单晶磁中子漫散射的XYZ偏振分析
XYZ-polarisation analysis of diffuse magnetic neutron scattering from single crystals
摘要：
漫磁散射的研究在很大程度上受益于使用一个多探测器覆盖广泛的散射角。因此，由磁散射、核相干散射和核自旋非相干散射产生的对漫散射的不同贡献可以通过所谓的XYZ偏振分析来分离。在过去，这种方法已成功地应用于磁无序材料的多晶样品的漫散射分析。利用自旋关联的矢量性质的单晶研究对于进一步理解磁性中的阻挫效应具有特别的意义。基于极化散射的对称性，本文对传统的XYZ方法作了适当的推广，使之能完全分离和分析单晶的磁散射特性。
英文摘要：
Studies of diffuse magnetic scattering largely benefit from the use of a multi-detector covering wide scattering angles. Therefore, the different contributions to the diffuse scattering that originate from magnetic, nuclear coherent, and nuclear spin-incoherent scattering can be separated by the so-called XYZ-polarization analysis. In the past this method has been successfully applied to the analysis of diffuse scattering by polycrystalline samples of magnetic disordered materials. Single crystal studies that exploit the vector properties of spin correlations are of particular interest for furthering our understanding of frustration effects in magnetism. Based on the symmetry properties of polarised scattering a suitable extension of the conventional XYZ method has been derived, which allows for the complete separation and the analysis of features of diffuse magnetic scattering from single crystals.
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