Vortex imaging in Co-doped BaFe2As2
| Title | Vortex imaging in Co-doped BaFe2As2 |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Eskildsen MR, Vinnikov LY, Veshchuno IS, Artemova TM, Blasius TD, Densmore JM, Dewhurst CD, Ni N, Kreyssig A, Bud'ko SL, Canfield PC, Goldman AI |
| Journal Title | Physica C-Superconductivity and Its Applications |
| Volume | 469 |
| Pages | 529-534 |
| Date Published | 06/01 |
| ISBN Number | 0921-4534 |
| Accession Number | ISI:000267191500028 |
| Keywords | angle neutron-scattering, flux-line-lattice, phase, pnictides, single-crystals, state, transition, vortex imaging |
| Abstract | We review superconducting vortex imaging in Co-doped BaFe2As2 by Bitter decoration and small-angle neutron scattering (SANS). At all measured fields a highly disordered vortex configuration is observed, which is attributed to strong pinning. Further Support of this conclusion comes from the absence of a Meissner rim in decoration images obtained close to the sample edge. The evolution of the SANS scattering vector with increasing applied field indicates vortex lattice domains of(distorted) hexagonal symmetry. This is consistent with the decoration images which show small, six fold coordinated ordered vortex domains. The SANS scattered intensity is found to decrease rapidly with increasing field, exceeding the rate expected from estimates of the upper critical field. This is consistent with the large degree of vortex "lattice" disorder. (C) 2009 Elsevier B.V. All rights reserved. |
| URL | <Go to ISI>://000267191500028 |
| DOI | 10.1016/J.Physc.2009.03.042 |
