NMR investigation of vortex dynamics in the Ba(Fe0.93Rh0.07)(2)As-2 superconductor
| Title | NMR investigation of vortex dynamics in the Ba(Fe0.93Rh0.07)(2)As-2 superconductor |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Bossoni L, Carretta P, Thaler A, Canfield PC |
| Journal Title | Physical Review B |
| Volume | 85 |
| Pages | 104525 |
| Date Published | 03 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000302003700003 |
| Keywords | ba0.6k0.4fe2as2, echo decay, flux lines, high-tc, high-temperature superconductors, MOTION, PENETRATION, spin-lattice-relaxation, superconductors, vortices, y-89 nmr |
| Abstract | As-75 NMR spin-lattice relaxation (1/T-1) and spin-echo decay (1/T-2) rate measurements were performed in a single crystal of Ba(Fe0.93Rh0.07)(2)As-2 superconductor. Below the superconducting transition temperature T-c, when the magnetic field H is applied along the c axes, a peak in both relaxation rates is observed. Remarkably that peak is suppressed for H perpendicular to c. Those maxima in 1/T-1 and 1/T-2 have been ascribed to the flux lines lattice motions and the corresponding correlation times and pinning energy barriers have been derived on the basis of a heuristic model. Further information on the flux lines motion was derived from the narrowing of As-75 NMR linewidth below T-c and found to be consistent with that obtained from 1/T-2 measurements. All the experimental results are described in the framework of thermally activated vortices motions. |
| URL | <Go to ISI>://WOS:000302003700003 |
| DOI | 10.1103/PhysRevB.85.104525 |
| Alternate Journal | Phys. Rev. B |
