Little-Parks effect and multiquanta vortices in a hybrid superconductor--ferromagnet system
A. Yu. Aladyshkin, A. S. Mel'nikov, D. A. Ryzhov
Abstract
Within the phenomenological Ginzburg-Landau theory we investigate the phase diagram of a thin superconducting film with ferromagnetic nanoparticles. We study the oscillatory dependence of the critical temperature on an external magnetic field similar to the Little-Parks effect and formation of multiquantum vortex structures. The structure of a superconducting state is studied both analytically and numerically.
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