Bean-Livingston surface barriers for flux penetration in Bi2Sr2CaCu2O8+delta single crystals near the transition temperature


Creative Commons License

Mihalache V., Dede M., Oral A. , Miu L.

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, vol.471, no.19-20, pp.563-565, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 471 Issue: 19-20
  • Publication Date: 2011
  • Doi Number: 10.1016/j.physc.2011.04.015
  • Title of Journal : PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
  • Page Numbers: pp.563-565
  • Keywords: Surface barriers, Magnetization loops, Bi-2212, SHPM, SUPERCONDUCTORS, FIELD, IRREVERSIBILITY

Abstract

The first field for magnetic flux penetration H in Bi2Sr2CaCu2O8+delta (Bi-2212) single crystals near the critical temperature T-c was investigated from the local magnetic hysteresis loops registered for different magnetic field H sweeping rates by using a scanning Hall probe microscope (SHPM) with similar to 1 mu m effective spatial resolution. Evidences for a significant role of the surface barrier were obtained: the asymmetric shape of the magnetization loops and an anomalous change in the slope of H-p(T) close to T-c. (C) 2011 Elsevier B.V. All rights reserved.