Department of Physics and Materials Science, University of Luxembourg, 162A avenue de la Faiencerie, L-1511 Luxembourg, Grand Duchy of Luxembourg.
IUCrJ. 2023 May 1;10(Pt 3):261-269. doi: 10.1107/S205225252300180X.
The magnetic small-angle neutron scattering (SANS) cross section of dilute ensembles of uniformly magnetized and randomly oriented Stoner-Wohlfarth particles is calculated using the Landau-Lifshitz equation. The focus of this study is on the angular anisotropy of the magnetic SANS signal as it can be seen on a two-dimensional position-sensitive detector. Depending on the symmetry of the magnetic anisotropy of the particles (e.g. uniaxial, cubic), an anisotropic magnetic SANS pattern may result, even in the remanent state or at the coercive field. The case of inhomogeneously magnetized particles and the effects of a particle-size distribution and interparticle correlations are also discussed.
使用朗道-利夫希茨方程计算了均匀磁化且随机取向的斯通纳-沃尔夫哈特粒子稀集会的磁小角中子散射（SANS）截面。本研究的重点是磁 SANS 信号的各向异性，因为它可以在二维位置灵敏探测器上看到。根据粒子磁各向异性的对称性（例如单轴、立方），即使在剩磁状态或矫顽场下，也可能会出现各向异性的磁 SANS 模式。本文还讨论了不均匀磁化粒子的情况以及粒径分布和粒子间相关性的影响。
