论文标题
与界面样DMI的非共线磁体完全极化相的小角度中子散射
Small-angle neutron scattering in fully polarized phase of non-collinear magnets with interfacial-like DMI
论文作者
论文摘要
在小角度散射几何形状中，讨论了具有$ C_ {NV} $对称性的非共线磁体中的自旋波。在最小模型的框架中，包括交换耦合，dzayloshinskii-moriya相互作用（DMI）和单离子各向异性，我们考虑了中等外部磁场和高场面完全极化相处的系统性能。在后一种情况下，由于DMI的最小垂直于平面内场的磁磁体，镁光谱被覆盖，并非磁透射，并且沿高对称轴的场类似铁磁性。在四种不同的几何形状中考虑了完全极化相（SWSAS）中的非弹性小角度中子散射。结果表明，这些几何形状中SWSAS截止特征的场依赖性的分析允许确定模型的所有重要参数。还讨论了在具有界面DMI的薄膜中提出的方法利用的可能性。
Spin waves in non-collinear magnets with $C_{nv}$ symmetry are discussed in the context of inelastic neutron scattering in small-angle scattering geometry. In the framework of a minimal model including exchange coupling, Dzayloshinskii-Moriya interaction (DMI), and single-ion anisotropy, we consider the system properties at moderate external magnetic fields and in the high-field fully polarized phase. In the latter case, the magnon spectrum is gapped and non-reciprocal due to DMI with the minimum perpendicular to the field direction for the in-plane field and is ferromagnetic-like for the field along the high-symmetry axis. Inelastic small-angle neutron scattering in the fully polarized phase (SWSANS) is considered in four different geometries. It is shown that analysis of the field dependence of the SWSANS cutoff feature in these geometries allows determining all important parameters of the model. The possibility of the proposed method utilization in thin films with interfacial DMI is also discussed.
