Manipulation of vortex arrays with thermal gradients by applying dynamic heat sources

Abstract

Abstract In this paper, we investigate the manipulation of vortex arrays of magnetic flux by using dynamic heat sources in the superconducting strip. The time-dependent Ginzburg–Landau (TDGL) equations and the heat diffusion equation are numerically solved to study the effect of the dynamic heat sources and the vortex dynamics of the sample. Three distinct velocity ranges were shown to occur, depending on the vortex motion and the corresponding characteristics of the induced voltage. Due to the relationship among the driving force, viscous force, and vortex–vortex interaction, the vortex motion changes from direct motion to a roughly harmonic motion with the velocity of the heat source. Meanwhile, the electromagnetic performance of the sample is also related to the heat source parameters, the applied magnetic fields and the pinning centers. In addition, the thermal effect leads to a more complex non-linear relationship between the induced voltage and the heat source velocity.