High-pressure studies on superconductivity in LaFeAsO 1-x F x and SmFeAsO 1-x F x

H. Takahashi, H. Okada, K. Igawa, Y. Kamihara, M. Hirano, H. Hosono, K. Matsubayashi, Y. Uwatoko

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The pressure dependence on the superconducting transition temperature (T c ) was investigated for the iron-based superconductors LaFeAsO 1-x F x and SmFeAsO 1-x F x . The T c 's increase largely for LaFeAsO 1-x F x with a small increase of pressure, while a sharp decrease of T c was observed for SmFeAsO 1-x F x . The electrical resistivity measurements reveal pressure-induced superconductivity for undoped LaFeAsO and SmFeAsO. These pressure effects seem to be related to an anisotropic decrease of the lattice constants under high pressure from the x-ray diffraction measurements up to 10 GPa for the LaFeAsO 1-x F x system.

Original languageEnglish
Pages (from-to)595-598
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume22
Issue number6
DOIs
Publication statusPublished - 2009 Aug 1
Externally publishedYes

Keywords

  • High-pressure
  • LaFeAsO F
  • Pressure-induced superconductivity
  • SmFeAsO F

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'High-pressure studies on superconductivity in LaFeAsO <sub>1-x</sub> F <sub>x</sub> and SmFeAsO <sub>1-x</sub> F <sub>x</sub>'. Together they form a unique fingerprint.

  • Cite this