75As-NMR Studies of LaFeAsO1-xFx for Various x Values

Details 75As-NMR Studies of LaFeAsO1-xFx for Various x Values 75As-NMR Studies of LaFeAsO1-xFx for Various x Values

2010-09-22

arxiv.org/abs/1009.4273v1

J. Phys. Soc. Jpn. 79 (2010) 093709 (4 pages)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1143/JPSJ.79.093709

Results of 75As NMR and NQR measurements are reported for superconducting samples of LaFeAsO1-xFx with various x values. The x dependent widths of the superconducting transition and those of the NQR spectra indicate that the optimally doped LaFeAsO1-xFx sample with the superconducting transition temperature Tc ~28 K has the smallest width or smallest inhomogeneity of the superconducting order parameter \Delta. In the analyses of the temperature (T) dependence of the NMR longitudinal relaxation rate 1/T1, we have tried to use a simple relation 1/T1 ~ T^n to see how fast 1/T1 decreases when the superconducting order parameter grows. The relation holds rather well in the T region of ~0.3Tc < T =< Tc, and n varies from 2.5-6 with varying x, having the maximum value 5-6 at the optimal x. These results indicate that the x dependence of n originates from the spatial distribution of \Delta, and that the T^{5-6} behavior is considered to be intrinsic to this system.

Affiliated with

Also associated with

No associations

Rating

75As-NMR Studies of LaFeAsO1-xFx for Various x Values does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 75As-NMR Studies of LaFeAsO1-xFx for Various x Values, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 75As-NMR Studies of LaFeAsO1-xFx for Various x Values will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-637573