Profile structure of magnetic flux lines in type-II superconductor from a rectangular electron hologram

Ken Harada, Marco Beleggia, Junji Endo, Hiroto Kasai, Yoshihiko Togawa, Tsuyoshi Matsuda, Akira Tonomura

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Profile magnetic configuration of a quantized flux line and flux-line lattice penetrating a type-II superconductor thing foil, niobium, was observed by electron holography and Lorentz microscopy using a 300 kV field-emission electron microscope. Each single flux line was distributed periodically as lattice structure in the mixed state just below its critical temperature of 8.5 K, while at low temperature of 5 K the flux lines were weakly bound as bundles. In order to observe the flux-line distribution over a wide area, discrete Fourier transform reconstruction in the holography was extended for a rectangular area without loss of information and data precision.
Original languageEnglish
JournalJournal of Electron Microscopy
Volume52
Issue number4
Pages (from-to)369-373
Number of pages5
ISSN0022-0744
Publication statusPublished - 2003
Externally publishedYes

Keywords

  • electron holography
  • electron microscopy
  • Lorentz microscopy
  • numerical reconstruction
  • superconducting flux lines
  • flux-line lattice

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