Vortex structures and configurations in a superconductor under helical magnetic field

Magnetic vortex structures in a superconductor under a helical magnetic field are investigated using the Ginzburg-Landau equations and the three-dimensional finite element method. Magnetic-field-amplitude dependence of vortex structure is investigated. Also how superconductivity is destroyed is shown. Also peculiar vortex structures are found under the helical magnetic field