Giant flux creep through surface barriers and the irreversibility line in high-temperature superconductors.

摘要: Magnetic and transport phenomena in high-temperature superconductors due to magnetic flux relaxation over the surface barrier are investigated. Vortex dynamics controlled by penetration both of pancake vortices vortex lines is discussed. The field ${\mathit{H}}_{\mathit{p}}$ for pancakes decays exponentially with temperature. size magnetization loop determined decay during process relaxation, but its shape remains unchanged. irreversibility line associated given ${\mathit{H}}_{\mathrm{irr}}$ \ensuremath{\propto}exp(-2T/${\mathit{T}}_{0}$) may lie above below melting line.