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

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

研究成果: Article査読

1 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1145-1148
ページ数4
ジャーナルJournal of Superconductivity and Novel Magnetism
24
3
DOI
出版ステータスPublished - 2011 4

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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