A. V. Shubnikov Institute of Crystallography, 119333 Moscow, Russia.
Phys Rev Lett. 2012 May 4;108(18):187203. doi: 10.1103/PhysRevLett.108.187203. Epub 2012 May 2.
A symmetry analysis of the Dzyaloshinskii-Moriya (DM) interaction in MnSi-type crystals reveals a nontrivial antiferromagnetic pattern of tilted Mn moments remaining even after an unwinding of the ground-state helix by a strong magnetic field. The remaining tilts are caused by that component of the DM vector which is perpendicular to the component responsible for helical spiraling; both components are evaluated and related to the atomic structure using a simple model. It is shown that the tilting should induce pure magnetic reflections 00ℓ(ℓ=2n+1) in neutron or x-ray magnetic scattering. In addition, the DM-induced antiferromagnetic ordering is important for the core structure of intrinsic defects, for the spectra of magnetic resonances, and generally for a better understanding of spin-orbit interaction in this type of magnetics.
对 MnSi 型晶体中的 Dzyaloshinskii-Moriya（DM）相互作用进行对称分析表明，即使在强磁场下使基态螺旋结构解开，倾斜 Mn 磁矩仍呈现非平庸的反铁磁图案。剩余的倾斜是由 DM 向量中垂直于负责螺旋缠绕的分量的那个分量引起的；使用简单模型评估了这两个分量，并将其与原子结构相关联。结果表明，倾斜应该在中子或 X 射线磁散射中诱导纯磁反射 00ℓ（ℓ=2n+1）。此外，DM 诱导的反铁磁有序对于本征缺陷的核心结构、磁共振谱以及对该类型磁体中自旋轨道相互作用的更好理解都很重要。
