Dynamics of Abrikosov’s vortex forced oscillations: role of frequency, acting forces and vortex parameters
The trajectories of motion of an isolated Abrikosov vortex in the anisotropic YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> superconductor under the influence of an external periodic force, damping into the sample, were constructed and analyzed, taking into account the inert properties of the vortex and the forces acting on it: pinning, Lorentz, elasticity and viscosity. The hierarchy of the influence of various forces in a wide frequency range (~ 1 THz) of the driving force on the shape and size of the trajectory is established. The calculated energy absorption by the vortex, as a function of frequency, taking into account the effective mass of the vortex, has resonant peaks: one at low frequency associated with the de Gennes and Matricon mode, the second high frequency. The differences, manifested in the manifestation of vortex-induced oscillations for different field orientations in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> and for the isotropic low-temperature superconductor NbTi, are analyzed.