Abstract Langevin dynamics is used to study equilibrium properties of the suspension of magnetic filaments (chains of nanoparticles permanently crosslinked with polymers). It is shown that the filament suspension generally has a larger magnetic susceptibility than the system of unlinked nanoparticles with the same average particle concentration. However, actual susceptibility gain strongly depends on length and flexibility of filaments. It is also shown that in a strong gravitational (centrifugal) field sedimentation profiles of filaments are less homogeneous than that of unlinked particles. The spatial distribution of filaments weakly depends on the intensity of interparticle dipole-dipole interactions.

中文翻译：

---

磁丝悬浮液的平衡特性

摘要 Langevin 动力学用于研究磁丝（与聚合物永久交联的纳米粒子链）悬浮液的平衡特性。结果表明，细丝悬浮液通常比具有相同平均颗粒浓度的未连接纳米颗粒系统具有更大的磁化率。然而，实际的磁化率增益很大程度上取决于细丝的长度和柔韧性。还表明，在强重力（离心）场中，细丝的沉降剖面比未连接颗粒的沉降剖面更不均匀。细丝的空间分布微弱地取决于粒子间偶极-偶极相互作用的强度。