Vortex phases in magnetic fields near ab-plane in Bi2Sr2CaCu2O8+delta single crystal


Mirkovic J., Saito T., Kashiwagi T., Kakeya I., Kubo Y., Yamamoto T., ...More

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, vol.470, 2010 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 470
  • Publication Date: 2010
  • Doi Number: 10.1016/j.physc.2009.11.095
  • Journal Name: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Keywords: Josephson vortex, Vortex phase diagram, c-Axis resistance Bi2Sr2CaCu2O8+delta, Vortex lock-in transition, LATTICE MELTING TRANSITION, JOSEPHSON VORTICES, SUPERCONDUCTORS, FILMS

Abstract

Vortex matter of the layered superconductors in very high magnetic fields near the ab-plane was studied by using the c-axis resistivity measurements on the mesoscopic Bi2Sr2CaCu2O8+delta single crystals. While the angular dependence of resistance exhibits the sharp lock-in features in low magnetic field region, it was found that the vortex lock-in transition becomes considerably broad in high magnetic fields, showing anomalous shoulders at 0.3 degrees away from the ab-plane. The appearance of the resistance shoulder is followed with the stronger current level dependence, indicating possible different phases due to interplay of Josephson vortices and pancake vortices near ab-plane. (C) 2009 Elsevier B.V. All rights reserved.