75As-nuclear magnetic relaxation on LaFeAsO1-xF x under pressure

N. Fujiwara, K. Tatsumi, T. Nakano, H. Okada, H. Takahashi, Yoichi Kamihara, M. Hirano, H. Hosono

Research output: Contribution to journalArticle

Abstract

75As-nuclear magnetic relaxation rate (1/T1) was measured under pressure in LaFeAsO1-xFx (x = 0.08 and 0.14). For the x = 0.14 doped samples, 1/T1T = constant is observed at ambient pressure just above Tc, and application of pressure enhances the value, similar to the behavior of Tc. 1/T1T = constant originates from the Korringa relation, and an increase in DOS due to pressure application leads to the enhancement of Tc. In the case of x = 0.08, 1/T1T = constant is observed in a wide T range above T c, and the value is enhanced compared to the case of x = 0.14. The enhancement is attributable to antiferromagnetic spin fluctuation rather than an increase in DOS.

Original languageEnglish
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec
Externally publishedYes

Fingerprint

Magnetic relaxation
magnetic relaxation
DOS
Spin fluctuations
augmentation

Keywords

  • High pressure
  • LaFeAsOF
  • NMR

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

Cite this

75As-nuclear magnetic relaxation on LaFeAsO1-xF x under pressure. / Fujiwara, N.; Tatsumi, K.; Nakano, T.; Okada, H.; Takahashi, H.; Kamihara, Yoichi; Hirano, M.; Hosono, H.

In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.

Research output: Contribution to journalArticle

Fujiwara, N, Tatsumi, K, Nakano, T, Okada, H, Takahashi, H, Kamihara, Y, Hirano, M & Hosono, H 2010, '75As-nuclear magnetic relaxation on LaFeAsO1-xF x under pressure', Physica C: Superconductivity and its Applications, vol. 470, no. SUPPL.1. https://doi.org/10.1016/j.physc.2009.10.156
Fujiwara, N. ; Tatsumi, K. ; Nakano, T. ; Okada, H. ; Takahashi, H. ; Kamihara, Yoichi ; Hirano, M. ; Hosono, H. / 75As-nuclear magnetic relaxation on LaFeAsO1-xF x under pressure. In: Physica C: Superconductivity and its Applications. 2010 ; Vol. 470, No. SUPPL.1.
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