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

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

2009-11-23

arxiv.org/abs/0911.4496v1

Physics

Condensed Matter

Superconductivity

This work was presented in the M2S conference which took place in Tokyo-Japan in September 2009

Scientific paper

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).

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