论文标题
极化中子衍射揭示的极性磁化
Polar magnetization unveiled by polarized neutron diffraction
论文作者
论文摘要
当离子占据不是反转对称中心的位点时，就存在极性磁性。幸运的是，这种磁化有助于中子散射，即磁性结构确定的基岩。分析散射的中子极化的实验不是新颖性。对室温赤铁矿（Alpha-Fe2O3）的极化中子散射幅度的模拟显示了提供的丰富信息。考虑了两个通过其大量铁磁磁性的方向区分的磁序。此外，对称启发的模拟挑战了最近的主张，以确定dzyaloshinskii-moriya（D-M）相互作用的绝对方向。
Polar magnetism is present when ions occupy sites that are not centres of inversion symmetry. Fortunately, such magnetization contributes to neutron scattering that is the bedrock of magnetic structure determinations. Experiments in which the scattered neutron polarization is analysed are not a novelty. Simulations of polarized neutron scattering amplitudes for room temperature haematite (alpha-Fe2O3) demonstrate the wealth of information on offer. Two magnetic motifs distinguished by the orientation of their bulk ferromagnetism are considered. Additionally, the symmetry-inspired simulations challenge a recent claim to have determined the absolute direction of the Dzyaloshinskii-Moriya (D-M) interaction.
