Abstract
Dynamic of the three-dimensional vortex system in layered high-temperature superconductors with internal nanosized ferromagnetic defects has been studied by using Monte Carlo simulations. Magnetization processes in the array of ferromagnetic defects under the field of Abrikosov vortices have been taken into account. The current-voltage characteristics under applying of external dc magnetic field have been obtained. It has been shown that S-type nonlinearity of E(J) curve which have been obtained previously for twodimensional vortex system also appears in this more realistic anisotropic three-dimensional case. The effect of vortex-vortex inter-layer coupling on the S-nonlinearity has been analyzed.
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