Magneto-optical imaging of polycrystalline LaFePO1-xF x

Y. Tsuchiya, Y. Nakajima, T. Tamegai, Y. Kamihara, M. Hirao, H. Hosono

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The remanent state field profile has been observed in polycrystalline LaFePO0.94F0.06 by magneto-optical (MO) imaging method. MO images show the absence of magnetic field modulation associated with weak-link nature of grain boundaries, indicating that the inter-grain critical current density Jcinter is comparable to intra-grain critical current density Jcintra in contrast to iron-arsenide superconductors. Jcinter is estimated as 1.9 × 104 A/cm2 at T = 0 K from magnetization measurement, which is similar to the values in iron-arsenide superconductors. Implication of these Jc behavior is discussed in relation to the possible pairing symmetry.

Original languageEnglish
Pages (from-to)S300-S301
JournalPhysica C: Superconductivity and its applications
Issue numberSUPPL.1
Publication statusPublished - 2010 Dec
Externally publishedYes


  • Critical current density
  • Iron oxypnictides
  • Magneto-optical imaging

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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