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 language | English |
|---|---|
| Pages (from-to) | 1145-1148 |
| Number of pages | 4 |
| Journal | Journal of Superconductivity and Novel Magnetism |
| Volume | 24 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2011 Apr 1 |
Keywords
- High pressure
- La 1111 series
- NMR
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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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, 24(3), 1145-1148. https://doi.org/10.1007/s10948-010-1097-x