Superconducting properties of SmFeAsO1-x prepared under high-pressure condition

Jing Ju, Khuong Huynh, Jun Tang, Zhaofei Li, Masanori Watahiki, Kazumi Sato, Hidenori Terasaki, Eiji Ohtani, Hirotsugu Takizawa, Katsumi Tanigaki

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Synthetic conditions such as stoichiometries, temperature and pressure are optimized to achieve a high quality oxygen deficient SmFeAsO0.6 superconductor. Both electric and magnetic measurements show a sharp superconducting transition at about 55 K. Several important physical parameters are deduced. The apparent superconducting gap observed in heat capacity with 2Δo/kBTc of 4.57 larger than that of previous fluorine replaced samples indicate that this superconductivity will not strongly conflict with the phonon-mediated BCS mechanism. The mean free length ℓ=18.8 nm and the coherent length ξ=2.3-3.3 nm show that the superconductivity is in the clean limit.

Original languageEnglish
Pages (from-to)491-494
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume71
Issue number4
DOIs
Publication statusPublished - Apr 2010
Externally publishedYes

Keywords

  • A. Superconductors
  • B. Inorganic compounds
  • C. Superconductivity
  • D. Electronic structure
  • E. Magnetic properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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