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

Research output: Contribution to journalArticle

37 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
Publication statusPublished - 2008
Externally publishedYes

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iron
magnetic permeability
electrical resistivity
superconductivity
transition temperature
diffraction
x rays

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Takahashi, H., Okada, H., Igawa, K., Arii, K., Kamihara, Y., Matsuishi, S., ... 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.

High-pressure studies on superconducting iron-based LaFeAsO 1-xFx, LaFePO and SrFe2As2. / Takahashi, Hiroki; Okada, Hironari; Igawa, Kazumi; Arii, Kazunobu; Kamihara, Yoichi; Matsuishi, Satoru; Hirano, Masahiro; Hosono, Hideo; Matsubayashi, Kazuyuki; Uwatoko, Yoshiya.

In: Journal of the Physical Society of Japan, Vol. 77, No. SUPPL. C, 2008, p. 78-83.

Research output: Contribution to journalArticle

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, vol. 77, no. SUPPL. C, pp. 78-83.
Takahashi, Hiroki ; Okada, Hironari ; Igawa, Kazumi ; Arii, Kazunobu ; Kamihara, Yoichi ; Matsuishi, Satoru ; Hirano, Masahiro ; Hosono, Hideo ; Matsubayashi, Kazuyuki ; Uwatoko, Yoshiya. / High-pressure studies on superconducting iron-based LaFeAsO 1-xFx, LaFePO and SrFe2As2. In: Journal of the Physical Society of Japan. 2008 ; Vol. 77, No. SUPPL. C. pp. 78-83.
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