F-19 NMR probe of structural features and flux-line motion in fluorinated Hg-1201

Authors
Morozova, EN Gippius, AA Antipov, EV Luders, K Hoffmann, W
Citation
En. Morozova et al., F-19 NMR probe of structural features and flux-line motion in fluorinated Hg-1201, PHYSICA B, 284, 2000, pp. 869-870
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
284
Year of publication
2000
Part
1
Pages
869 - 870
Database
ISI
SICI code
0921-4526(200007)284:<869:FNPOSF>2.0.ZU;2-Y
Abstract
F-19 NMR spectroscopy has been applied to study local copper environment an d flux-line motion in the oxy-fluorine superconductors HgBa2 CuO4 F-x with different fluorine content. The temperature dependence of the F-19 NMR line width reveals the crossover at 35K between the low-temperature thermally ac tivated regime with correlation time tau = tau(0) exp(U/T) and high-tempera ture "melted" regime with tau = const. (C) 2000 Published by Elsevier Scien ce B.V. All rights reserved.