Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

3-1-2012

Journal or Book Title

Physical Review B

Volume

85

Issue

10

First Page

104525

DOI

10.1103/PhysRevB.85.104525

Abstract

75As NMR spin-lattice relaxation (1/T1) and spin-echo decay (1/T2) rate measurements were performed in a single crystal of Ba(Fe0.93Rh0.07)2As2 superconductor. Below the superconducting transition temperature Tc, 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⊥c. Those maxima in 1/T1 and 1/T2 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 75As NMR linewidth below Tc and found to be consistent with that obtained from 1/T2 measurements. All the experimental results are described in the framework of thermally activated vortices motions.

Comments

This article is published as Bossoni, L., P. Carretta, A. Thaler, and P. C. Canfield. "NMR investigation of vortex dynamics in the Ba (Fe 0.93 Rh 0.07) 2 As 2 superconductor." Physical Review B 85, no. 10 (2012): 104525. DOI: 10.1103/PhysRevB.85.104525. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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