Direct observation of interlayer josephson vortices in heavily Pb-doped Bi2Sr2CaCu2Oy by scanning superconducting quantum interference device microscopy

Junpei Kasai, Noriaki Okazaki, Yuri Nakayama, Teruki Motohashi, Jun Ichi Shimoyama, Kohji Kishio, Yuji Matsumoto, Hideomi Koinuma, Tetsuya Hasegawa

Research output: Contribution to journalArticlepeer-review

Abstract

Josephson vortices trapped in cross-sectional edge surfaces of Pb 0.6Bi1.4Sr2CaCu2Oy has been directly observed by using a scanning superconducting quantum interference device (SQUID) microscope. The magnetic field distribution Bz around each vortex is substantially anisotropic, compared with the usual vortex in the ab-plane, and is extended over 100 μm toward the in-plane direction. By fitting a theoretical Bz function to experimental ones, c-axis penetration depth λc was estimated to be 11.2 ± 0.7 μm, which is in good agreement with the literature value, 12.6 μm, obtained from the Josephson plasma edge frequency.

Original languageEnglish
Pages (from-to)L490-L492
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume45
Issue number17-19
DOIs
Publication statusPublished - 2006 May 12
Externally publishedYes

Keywords

  • Anisotropy
  • BiSrCaCuO
  • Josephson vortex
  • Penetration depth
  • Scanning SQUID microscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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