论文标题
由外部磁场控制的移植铁磁丝的吸附过渡
Adsorption transition of a grafted ferromagnetic filament controlled by external magnetic fields
论文作者
论文摘要
广泛的Langevin动力学模拟用于表征移植到有吸引力的平面表面上的柔性磁丝的吸附过渡。我们的结果确定了在热能与表面吸引强度不同比率下的不同结构过渡：灯丝拉直，吸附和磁通量闭合。与等效的非磁性链相比，发现磁丝的吸附温度更高。在应用静态均质外部磁场的应用下，吸附也已研究。我们发现，该场的强度和方向可用于控制吸附过程，从而提供精确的开关机制。有趣的是，我们观察到，吸附点处的特征场强度和倾斜角与简单的幂定律有关。
Extensive Langevin dynamics simulations are used to characterize the adsorption transition of a flexible magnetic filament grafted onto an attractive planar surface. Our results identify different structural transitions at different ratios of the thermal energy to the surface attraction strength: filament straightening, adsorption and the magnetic flux closure. The adsorption temperature of a magnetic filament is found to be higher in comparison to an equivalent nonmagnetic chain. The adsorption has been also investigated under the application of a static homogeneous external magnetic field. We found that the strength and the orientation of the field can be used to control the adsorption process, providing a precise switching mechanism. Interestingly, we have observed that the characteristic field strength and tilt angle at the adsorption point are related by a simple power law.
