TY - JOUR
T1 - Ferromagnetic spin fluctuation in LaFeAsO1-x Fx
AU - Kohama, Yoshimitsu
AU - Kamihara, Yoichi
AU - Hirano, Masahiro
AU - Kawaji, Hitoshi
AU - Atake, Tooru
AU - Hosono, Hideo
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/7/29
Y1 - 2008/7/29
N2 - The F-doped LaFeAsO-a recently discovered superconductor with the high Tc of 26 K-has been studied using the resistivity (ρ), magnetic-susceptibility (χ), and heat-capacity (Cp) measurements in the F doping range 0≤x≤0.14 (LaFeAsO1-x Fx). In the low-temperature region, a T3 lnT term in Cp and a T2 term in χ -which are derived from the spin fluctuation-are observed. The nearly ferromagnetic nature evidenced by a large Wilson ratio (6.5 for x=0 and 11.2 for x=0.025) suggests that the superconductivity in the LaFeAsO system is mediated by ferromagnetic spin fluctuation.
AB - The F-doped LaFeAsO-a recently discovered superconductor with the high Tc of 26 K-has been studied using the resistivity (ρ), magnetic-susceptibility (χ), and heat-capacity (Cp) measurements in the F doping range 0≤x≤0.14 (LaFeAsO1-x Fx). In the low-temperature region, a T3 lnT term in Cp and a T2 term in χ -which are derived from the spin fluctuation-are observed. The nearly ferromagnetic nature evidenced by a large Wilson ratio (6.5 for x=0 and 11.2 for x=0.025) suggests that the superconductivity in the LaFeAsO system is mediated by ferromagnetic spin fluctuation.
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U2 - 10.1103/PhysRevB.78.020512
DO - 10.1103/PhysRevB.78.020512
M3 - Article
AN - SCOPUS:48749093686
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 2
M1 - 020512
ER -