Superconductivity in Iron Oxypnictide Induced by F-Doping

Yoichi Kamihara, H. Hosono

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

In the history of superconductors, Fe-based superconductor LnFePnO1-xFx (1111) has the highest Tc at ~58K except Cu-based oxide superconductors. Electron doping by substitution of O2- with F- was essential to induce superconductivity. Local structures around iron are found to have a good empirical relation to Tc. Maximum Tc is observed for 1111 materials having nearly regular tetrahedral FeAs4 local structures. The Tc and upper critical field of 1111 compounds are very attractive for power cable under high magnetic fields, although fabrication of practical superconducting wires is a tough challenge due to the difficulty in controlling the F contents during a processing for ex-situ powder-in-tube method.

Original languageEnglish
Title of host publicationPhotonic and Electronic Properties of Fluoride Materials: Progress in Fluorine Science Series
PublisherElsevier Inc.
Pages423-446
Number of pages24
ISBN (Electronic)9780128017951
ISBN (Print)9780128016398
DOIs
Publication statusPublished - 2016 Mar 15

Keywords

  • Bulk superconductivity
  • Ex-situ powder-in-tube (PIT) method
  • Fluorine doping
  • Iron-based superconductors
  • LaFeAsO
  • Rare earth
  • SmFeAsO
  • Superconducting critical current
  • Superconducting critical magnetic field
  • Superconducting wires

ASJC Scopus subject areas

  • Chemistry(all)

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  • Cite this

    Kamihara, Y., & Hosono, H. (2016). Superconductivity in Iron Oxypnictide Induced by F-Doping. In Photonic and Electronic Properties of Fluoride Materials: Progress in Fluorine Science Series (pp. 423-446). Elsevier Inc.. https://doi.org/10.1016/B978-0-12-801639-8.00019-2