High-pressure studies on superconducting iron-based LaFeAsO 1-xFx, LaFePO and SrFe2As2

Hiroki Takahashi, Hironari Okada, Kazumi Igawa, Kazunobu Arii, Yoichi Kamihara, Satoru Matsuishi, Masahiro Hirano, Hideo Hosono, Kazuyuki Matsubayashi, Yoshiya Uwatoko

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38 Citations (Scopus)

Abstract

Electrical resistivity and magnetic susceptibility measurements under high pressure were performed on iron-based superconductor LaFePO and LaFeAsO 1-xFx system. A steep increase in superconducting transition temperature (Tc) was observed for LaFePO and "optimum-doped" and "over-doped" LaFeAsO1-xF x. Pressure-induced superconductivity was confirmed in undoped LaFeAsO and SrFe2As2 by electrical resistivity measurements under high pressure. X-ray diffraction measurements were also performed under high pressure up to 10 GPa for LaFePO and LaFeAsO 1-xFx system, where the anisotropic decrease of the lattice constants was observed with applying pressure.

Original languageEnglish
Pages (from-to)78-83
Number of pages6
JournalJournal of the Physical Society of Japan
Volume77
Issue numberSUPPL. C
DOIs
Publication statusPublished - 2008 Jan 1
Externally publishedYes

Keywords

  • High pressure
  • Iron-based superconductor
  • LaFeAsO F
  • LaFePO
  • Oxypnictide
  • SrFeAs
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Takahashi, H., Okada, H., Igawa, K., Arii, K., Kamihara, Y., Matsuishi, S., Hirano, M., Hosono, H., Matsubayashi, K., & Uwatoko, Y. (2008). High-pressure studies on superconducting iron-based LaFeAsO 1-xFx, LaFePO and SrFe2As2. Journal of the Physical Society of Japan, 77(SUPPL. C), 78-83. https://doi.org/10.1143/JPSJS.77SC.78