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Controlled suppression of local magnetization hysteresis by dc in-plane field in Bi2Sr2CaCu2O8

Local magnetization hysteresis is among the most extensively studied features of high-temperature superconductors (HTSC). The usual source of hysteresis in superconductors is bulk vortex pinning due to material defects. Two additional known mechanisms of magnetic irreversibility are the Bean-Livingston surface barrier and the geometrical barrier (GB). GB arises due to a competition between the line energy of a vortex penetrating into the sample and the Lorentz force of Meissner currents which focuses vortices in the sample's center to form a dome-shaped vortex distribution. This work demonstrates that dc in-plane field overcomes hysteresis mainly through the GB suppression in a region of phase diagram under consideration (high temperatures and low fields).

preprint2009arXivOpen access

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Controlled suppression of local magnetization hysteresis by dc in-plane field in Bi2Sr2CaCu2O8 | BZPEER | BZPEER