75As NMR studies of superconducting LaFeAsO0.9F0.1 (CROSBI ID 142754)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Grafe, H.-J. ; Paar, Dalibor ; Lang, G. ; Curro, N. J. ; Behr, G. ; Werner, J. ; Hamann-Borrero, J. ; Hess, C. ; Leps, N. ; Klingeler, R. ; Büchner, B.
engleski
75As NMR studies of superconducting LaFeAsO0.9F0.1
We have performed 75As nuclear magnetic resonance measurements on aligned powders of the new LaFeAsO0:9F0:1 superconductor. In the normal state, we find a strong temperature dependence of the spin shift and Korringa behavior of the spin lattice relaxation rate. In the superconducting state, we find evidence for line nodes in the superconducting gap and spin-singlet pairing. Our measurements reveal a strong anisotropy of the spin lattice relaxation rate, which suggests that superconducting vortices contribute to the relaxation rate when the field is parallel to the c axis but not for the perpendicular direction.
Superconducting materials; Nuclear magnetic resonance and relaxation
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Podaci o izdanju
101 (4)
2008.
047003-1-047003-4
objavljeno
0031-9007
10.1103/PhysRevLett.101.047003