Scaling behavior of the fluctuations in magnetization and conductivity of untwinned YBa2Cu3O7−δ
✍ Scribed by U. Welp; S. Fleshler; W.K. Kwok; R.A. Klemm; V.M. Vinokur; J. Downey; G.W. Crabtree
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 222 KB
- Volume
- 185-189
- Category
- Article
- ISSN
- 0921-4534
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The upper critical field of untwinned YBa,Cu,O,\_, crystals is determined from the onset of diamagnetism in dc-magnetization measurements. There is no evidence of anisotropy in the upper critical field in the basal plane indicating that the ordering of oxygen into chains plays only a minor role in
The Hall and longitudinal resistivities, Pxv and p~, respectively, of the YBa2Cu3OT\_, epitaxial II changes films have been measured at 80 K< T < 185 K. The fluctuation Hall conductivity cr~y its sign at temperatures T\*(H)> Tc(H=O). The T-dependence of crxyl(Z~ ,If" lz where c~ll is the fluctuation