TY - JOUR
T1 - 75As-nuclear magnetic relaxation on LaFeAsO1-xF x under pressure
AU - Fujiwara, N.
AU - Tatsumi, K.
AU - Nakano, T.
AU - Okada, H.
AU - Takahashi, H.
AU - Kamihara, Y.
AU - Hirano, M.
AU - Hosono, H.
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010/12
Y1 - 2010/12
N2 - 75As-nuclear magnetic relaxation rate (1/T1) was measured under pressure in LaFeAsO1-xFx (x = 0.08 and 0.14). For the x = 0.14 doped samples, 1/T1T = constant is observed at ambient pressure just above Tc, and application of pressure enhances the value, similar to the behavior of Tc. 1/T1T = constant originates from the Korringa relation, and an increase in DOS due to pressure application leads to the enhancement of Tc. In the case of x = 0.08, 1/T1T = constant is observed in a wide T range above T c, and the value is enhanced compared to the case of x = 0.14. The enhancement is attributable to antiferromagnetic spin fluctuation rather than an increase in DOS.
AB - 75As-nuclear magnetic relaxation rate (1/T1) was measured under pressure in LaFeAsO1-xFx (x = 0.08 and 0.14). For the x = 0.14 doped samples, 1/T1T = constant is observed at ambient pressure just above Tc, and application of pressure enhances the value, similar to the behavior of Tc. 1/T1T = constant originates from the Korringa relation, and an increase in DOS due to pressure application leads to the enhancement of Tc. In the case of x = 0.08, 1/T1T = constant is observed in a wide T range above T c, and the value is enhanced compared to the case of x = 0.14. The enhancement is attributable to antiferromagnetic spin fluctuation rather than an increase in DOS.
KW - High pressure
KW - LaFeAsOF
KW - NMR
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U2 - 10.1016/j.physc.2009.10.156
DO - 10.1016/j.physc.2009.10.156
M3 - Article
AN - SCOPUS:78649690851
VL - 470
SP - S347-S348
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL.1
ER -