Abstract
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.
| Original language | English |
|---|---|
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 470 |
| Issue number | SUPPL.1 |
| DOIs | |
| Publication status | Published - 2010 Dec |
| Externally published | Yes |
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Keywords
- High pressure
- LaFeAsOF
- NMR
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Electronic, Optical and Magnetic Materials
Cite this
75As-nuclear magnetic relaxation on LaFeAsO1-xF x under pressure. / Fujiwara, N.; Tatsumi, K.; Nakano, T.; Okada, H.; Takahashi, H.; Kamihara, Yoichi; Hirano, M.; Hosono, H.
In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.Research output: Contribution to journal › Article
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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, Yoichi
AU - Hirano, M.
AU - Hosono, H.
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
UR - http://www.scopus.com/inward/record.url?scp=78649690851&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78649690851&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2009.10.156
DO - 10.1016/j.physc.2009.10.156
M3 - Article
AN - SCOPUS:78649690851
VL - 470
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL.1
ER -