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Local magnetization hysteresis is among the most extensively studied featuresof high-temperature superconductors (HTSC). The usual source of hysteresis insuperconductors is bulk vortex pinning due to material defects. Two additionalknown mechanisms of magnetic irreversibility are the Bean-Livingston surfacebarrier and the geometrical barrier (GB). GB arises due to a competitionbetween the line energy of a vortex penetrating into the sample and the Lorentzforce of Meissner currents which focuses vortices in the sample's center toform a dome-shaped vortex distribution. This work demonstrates that dc in-planefield overcomes hysteresis mainly through the GB suppression in a region ofphase diagram under consideration (high temperatures and low fields).

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