Stress overshoot and configuration-induced hysteresis in type-II superconducting films with a periodic pinning array
Q. H. Chen, C. Carballeira, T. Nishio, B. Y. Zhu, V. V. Moshchalkov
DOI 10.1103/PhysRevB.78.172507 · Physical Review B
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Abstract
We have simulated numerically the voltage-current (V−I) characteristics of a type-II superconducting film with three different types of periodic magnetic dot arrays. Our findings show that, in the absence of thermal fluctuations, the vortex-vortex and pin interactions vary with the configuration of the dot array. Subsequently, the three systems present different degrees of stress overshoot that give rise to different hysteresis and types of transitions in their V−I curves. The width of the hysteresis can be analytically estimated by using an infinite-range model, which is in good agreement with the simulations.
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