Observation of interacting crossing vortex lattices in Bi2Sr2CaCu2O8+δ thin films

A. Crisan, S. J. Bending, S. Popa, Z. Z. Li, and H. Raffy
Phys. Rev. B 72, 214509 – Published 9 December 2005

Abstract

Scanning Hall probe microscopy and magnetometry have been used to study pancake vortices (PV’s) in highly anisotropic Bi2Sr2CaCu2O8+δ (BSCCO) thin films. For small perpendicular applied fields we observe well-defined PV stacks which are randomly pinned due to a high density of relatively strong pinning centers in the films. When a strong in-plane magnetic field is added images reveal stripelike flux structures which are quite closely aligned to the in-plane field direction. We conclude that this is a manifestation of Josephson vortex (JV) “decoration” by PV’s, which was recently demonstrated in highly ordered BSCCO single crystals in the crossing lattices regime, allowing independent estimates of the anisotropy parameter to be made. This interpretation is supported by the observation that the presence of an in-plane field suppresses the irreversible magnetization of thicker films. Estimates of the JV-PV crossing force and the PV pinning force are found to be comparable in magnitude and fully consistent with this scenario. We believe that this is the first confirmation of the existence of interacting crossing vortex lattices in strongly pinning BSCCO thin films and could find potential applications in superconducting devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 31 March 2005

DOI:https://doi.org/10.1103/PhysRevB.72.214509

©2005 American Physical Society

Authors & Affiliations

A. Crisan1,2,*, S. J. Bending1, S. Popa2, Z. Z. Li3, and H. Raffy3

  • 1Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
  • 2National Institute for Materials Physics, Magurele, 105 bis Atomistilor Str., 077125 Bucharest, Romania
  • 3Laboratoire de Physique des Solides, Bâtiment 510, UMR 8502, Université Paris-Sud, 91405 Orsay, France

  • *Corresponding author. Electronic address: acrisan@infim.ro

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 72, Iss. 21 — 1 December 2005

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×