Magneto-optical imaging of polycrystalline LaFePO1-xF x

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec
Externally publishedYes

Fingerprint

Superconducting materials
critical current
Iron
current density
Imaging techniques
iron
Telecommunication links
Magnetization
Grain boundaries
grain boundaries
Modulation
Magnetic fields
modulation
magnetization
symmetry
profiles
magnetic fields

Keywords

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

ASJC Scopus subject areas

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

Cite this

Magneto-optical imaging of polycrystalline LaFePO1-xF x. / Tsuchiya, Y.; Nakajima, Y.; Tamegai, T.; Kamihara, Yoichi; Hirao, M.; Hosono, H.

In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.

Research output: Contribution to journalArticle

Tsuchiya, Y. ; Nakajima, Y. ; Tamegai, T. ; Kamihara, Yoichi ; Hirao, M. ; Hosono, H. / Magneto-optical imaging of polycrystalline LaFePO1-xF x. In: Physica C: Superconductivity and its Applications. 2010 ; Vol. 470, No. SUPPL.1.
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