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

doi:10.1007/s10948-010-1097-x

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

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	1145-1148
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	24
Issue number	3
DOIs	https://doi.org/10.1007/s10948-010-1097-x
Publication status	Published - 2011 Apr

Keywords

High pressure
La 1111 series
NMR

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-010-1097-x

Fingerprint Dive into the research topics of 'NMR study under pressure on the La1111 pnictides, LaFeAsO <sub>1-x</sub> F <sub>x</sub>'. Together they form a unique fingerprint.

Cite this

@article{fa8606dceb8d43e9a2a58c489206eea0,

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

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.",

keywords = "High pressure, La 1111 series, NMR",

author = "N. Fujiwara and T. Nakano and H. Okada and H. Takahashi and Y. Kamihara and M. Hirano and H. Hosono",

year = "2011",

month = apr,

doi = "10.1007/s10948-010-1097-x",

language = "English",

volume = "24",

pages = "1145--1148",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "3",

}

TY - JOUR

T1 - NMR study under pressure on the La1111 pnictides, LaFeAsO 1-x F x

AU - Fujiwara, N.

AU - Nakano, T.

AU - Okada, H.

AU - Takahashi, H.

AU - Kamihara, Y.

AU - Hirano, M.

AU - Hosono, H.

PY - 2011/4

Y1 - 2011/4

N2 - 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.

AB - 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.

KW - High pressure

KW - La 1111 series

KW - NMR

UR - http://www.scopus.com/inward/record.url?scp=79952538975&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952538975&partnerID=8YFLogxK

U2 - 10.1007/s10948-010-1097-x

DO - 10.1007/s10948-010-1097-x

M3 - Article

AN - SCOPUS:79952538975

VL - 24

SP - 1145

EP - 1148

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 3

ER -