论文标题
长波长磁调制的小角度中子散射减少了样品尺寸
Small-angle neutron scattering of long-wavelength magnetic modulations in reduced sample dimensions
论文作者
论文摘要
磁性小角度中子散射（SAN）非常适合提供长波长磁调制的直接，相互空间的信息，例如螺旋型，孤子，梅隆或天际。这些结构在薄膜或微型结构散装材料中的SAN受到了很小的散射体积的限制，而这些散射量与底物和支撑结构的过于较大的背景散射。考虑到近距离散射的近距离临界角度，在底物或支撑结构引起的信号贡献变得很小，我们建立了在传统传统传输和近距离传播的MNSI抛光大量样品中，在螺旋，圆锥形的，天空的晶状体以及波动disorder-disordered相位的相等散射模式。这激发了预测一个完整的存储库，这些储存库的散射模式预期了薄膜在近表面的SANS几何形状中，相对于散射平面的每个方向。
Magnetic small-angle neutron scattering (SANS) is ideally suited to provide direct, reciprocal-space information of long-wavelength magnetic modulations, such as helicoids, solitons, merons, or skyrmions. SANS of such structures in thin films or micro-structured bulk materials is strongly limited by the tiny scattering volume vis a vis the prohibitively large background scattering by the substrate and support structures. Considering near-surface scattering closely above the critical angle of reflection, where unwanted signal contributions due to substrate or support structures becomes very small, we establish equivalent scattering patterns of the helical, conical, skyrmion lattice, and fluctuation-disordered phases in a polished bulk sample of MnSi between conventional transmission and near-surface SANS geometries. This motivates the prediction of a complete repository of scattering patterns expected for thin films in the near-surface SANS geometry for each orientation of the magnetic order with respect to the scattering plane.
