NMR study under pressure on the La1111 pnictides, LaFeAsO 1-x F x

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

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

The relationship between antiferromagnetic (AF) fluctuation and superconductivity was investigated in the La1111 series, LaFeAsO 1-x F x (x=0.05, 0.08, and 0.14) by examining nuclear relaxation rates (1/T 1) at both ambient pressure and 3.0 GPa. Although the AF fluctuation is enhanced by applying pressure in the underdoped regime (x=0.05, and 0.08), the increase in critical transition temperature (T c) is small, whereas T c increases remarkably in the overdoped regime (x=0.14) where the AF fluctuation is absent, suggesting that high T c above 40 K originates not from the AF fluctuation but from the density of states at the electron pocket.

Original languageEnglish
Pages (from-to)1145-1148
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Volume24
Issue number3
DOIs
Publication statusPublished - 2011 Apr

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Group 5A compounds
Nuclear magnetic resonance
nuclear magnetic resonance
Superconductivity
Superconducting transition temperature
nuclear relaxation
Electrons
critical temperature
superconductivity
transition temperature
electrons

Keywords

  • High pressure
  • La 1111 series
  • NMR

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

NMR study under pressure on the La1111 pnictides, LaFeAsO 1-x F x . / Fujiwara, N.; Nakano, T.; Okada, H.; Takahashi, H.; Kamihara, Yoichi; Hirano, M.; Hosono, H.

In: Journal of Superconductivity and Novel Magnetism, Vol. 24, No. 3, 04.2011, p. 1145-1148.

Research output: Contribution to journal › Article

Fujiwara, N, Nakano, T, Okada, H, Takahashi, H, Kamihara, Y, Hirano, M & Hosono, H 2011, 'NMR study under pressure on the La1111 pnictides, LaFeAsO 1-x F x ', Journal of Superconductivity and Novel Magnetism, vol. 24, no. 3, pp. 1145-1148. https://doi.org/10.1007/s10948-010-1097-x
Fujiwara N, Nakano T, Okada H, Takahashi H, Kamihara Y, Hirano M et al. NMR study under pressure on the La1111 pnictides, LaFeAsO 1-x F x Journal of Superconductivity and Novel Magnetism. 2011 Apr;24(3):1145-1148. https://doi.org/10.1007/s10948-010-1097-x
Fujiwara, N. ; Nakano, T. ; Okada, H. ; Takahashi, H. ; Kamihara, Yoichi ; Hirano, M. ; Hosono, H. / NMR study under pressure on the La1111 pnictides, LaFeAsO 1-x F x In: Journal of Superconductivity and Novel Magnetism. 2011 ; Vol. 24, No. 3. pp. 1145-1148.
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