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Phys. Rev. B 74, 054502 (2006) [5 pages]

Periodic oscillations of Josephson-vortex flow resistance in oxygen-deficient YBa2Cu3Ox

M. Nagao, S. Urayama, S. M. Kim, H. B. Wang, K. S. Yun, Y. Takano, T. Hatano, I. Iguchi, T. Yamashita, M. Tachiki, and H. Maeda
National Institute for Materials Science, 1-2-1 Sengen, Tsukuba 305-0047, Japan

M. Sato
Kitami Institute of Technology, 165 Koen-cho, Kitami 090-8507, Japan
Received 21 November 2005; revised 29 May 2006; published 3 August 2006

We measured the Josephson vortex flow resistance as a function of magnetic field applied parallel to the ab planes using annealed YBa2Cu3Ox intrinsic Josephson junctions having high anisotropy (~40) by oxygen content reduction. Periodic oscillations were observed in magnetic fields above 45–58  kOe, corresponding to dense-dilute boundary for Josephson vortex lattice. The observed period of oscillations, which agrees well with the increase of one fluxon per two junctions (Hp=Phi0/2Ls), may correspond to formation of a triangular lattice of Josephson vortices as has been reported by Ooi et al. for highly anisotropic (>=200) Bi-2212 intrinsic Josephson junctions.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.74.054502
DOI: 10.1103/PhysRevB.74.054502
PACS: 74.25.Qt; 74.25.Fy; 74.72.Bk
  • 74.25.Qt
    Vortex lattices, flux pinning, flux creep in superconductors
  • 74.25.Fy
    Transport properties of superconductors including electric and thermal conductivity, thermoelectric effects, etc
  • 74.72.Bk
    Y-based cuprates (HTSC)
  • YEAR: 2006
KEYWORDS: yttrium compounds, barium compounds, high-temperature superconductors, Josephson effect, flux flow, annealing, flux-line lattice

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