二氧化钌（RuO2）的磁性及圆偏振X射线Bragg衍射中的荷磁干涉
Magnetic properties of ruthenium dioxide (RuO2) and charge-magnetic interference in Bragg diffraction of circularly polarized x-rays
摘要：
金红石型RuO 2可能支持一个简单的反铁磁结构，可以通过X射线布拉格衍射验证。三个磁图案，不打破平移对称性进行了探讨，在计算的振幅适合于衍射增强通过调整的主要X射线能量的钌原子共振。通过电荷-磁干涉耦合到X射线螺旋度是所有图案共有的，连同在偏振的旋转通道中正交的磁强度和电荷强度。这些衍射现象的必要条件是一个中心对称的晶体结构，零磁传播矢量，并没有一个线性磁电效应。发表的RuO 2的X射线衍射数据进行了分析的作者对磁性图案，不满足条件。用极化中子研究反铁磁畴，可以用满足所述晶体和磁对称性的样品来实现。
英文摘要：
Rutile-type RuO2 likely supports a simple antiferromagnetic structure which can be verified by x-ray Bragg diffraction. Three magnetic motifs that do not break translation symmetry are explored in calculations of amplitudes suitable for diffraction enhanced by tuning the primary x-ray energy to a ruthenium atomic resonance. Coupling to x-ray helicity through a charge-magnetic interference is common to all motifs, together with magnetic and charge intensities in quadrature in the rotated channel of polarization. Necessary conditions for these diffraction phenomena are a centrosymmetric crystal structure, null magnetic propagation vector, and absence of a linear magnetoelectric effect. Published x-ray diffraction data for RuO2 was analysed by the authors against a magnetic motif that does not satisfy the conditions. A polarized neutron study of antiferromagnetic domains can be achieved with a sample that meets the stated crystal and magnetic symmetries.
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