title: Parametric excitation of bending deformations of a rod by periodic twist.
abstract: A model of a semiflexible magnetic filament with magnetization frozen in the direction perpendicular to the tangent of its center line is formulated. It is shown that if the rod is magnetized at its ends in opposite directions, an AC magnetic field causes parametric excitation of bending deformations. Neutral curves of parametric excitation are calculated both analytically and numerically. The shapes arising upon parametric excitation of bending deformations are chiral. Periodic rotation of the chiral filament due to nonhomogeneous twist in a nonhomogeneous AC field causes its unidirectional motion.
authors.affiliation: University of Latvia, Zeļļu 8, Rīga, LV 1002, Latvia.
authors.forename: M
authors.initials: M
authors.lastname: Belovs
authors.forename: A
authors.initials: A
authors.lastname: Cēbers
mesh_terms: D003198:Computer Simulation; D004574:Electromagnetic Fields; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D012399:Rotation