Adsorption transition of a grafted ferromagnetic filament controlled by external magnetic fields
Abstract
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.
Keywords
Cite
@article{arxiv.2007.09489,
title = {Adsorption transition of a grafted ferromagnetic filament controlled by external magnetic fields},
author = {Pedro A. Sánchez and Ekaterina V. Novak and Elena S. Pyanzina and Sofia S. Kantorovich and Joan J. Cerdà and Tomás Sintes},
journal= {arXiv preprint arXiv:2007.09489},
year = {2022}
}