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Vortex dynamics in twinned superconductors

B. Y. Zhu, Jinming Dong, D. Y. Xing, Z. D. Wang

DOI 10.1103/PhysRevB.57.5075 · Physical Review B

T1

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Abstract

We numerically solve the overdamped equation of vortex motion in a twin-boundary (TB) superconductor, in which the applied Lorentz force FL, the pinning forces due to TB’s and point defects, and the intervortex interacting force are taken into account. Our simulations show that TB’s act as easy flow channels for the vortex motion parallel to the TB’s and obstructive barriers for that normal to the TB’s. Due to the barrier effect, the transverse velocity of vortices increases with FL, but if FL is strong enough, the vortices can cross through the TB’s so that the transverse velocity vs FL curve exhibits peak behavior.

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FormulaReported Tc (K)Pressure (GPa)Type
YBa2Cu3O7-x

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—Pressure not reportedunknown

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