Vortex dynamics and magnetization properties in mesoscopic superconductor under pulsed field magnetization

Abstract

Under the research background where the magnetic control and dynamic control mechanisms of mesoscopic superconductors under pulsed magnetization are still unclear, this paper takes circular mesoscopic superconducting films as the research object, revealing the vortex evolution mechanism and magnetization control laws of such films under pulsed magnetization. Based on the Ginzburg–Landau theory, this work established a vortex motion and energy evolution model, combined with numerical simulation, and systematically studied the influence of various parameters. The results show that the pulse characteristic time dominates the vortex response rate; the dimensionless time ratio, radius, and temperature, respectively, regulate the response laws such as vortex order degree, motion space, and disorder effect. This research deepens the understanding of the multi-parameter collaborative control of vortex dynamics in superconducting films and provides certain theoretical support for the precise control of vortex states in superconducting magnets and the preparation of superconducting devices.