A study of dimensional crossover in YBa2Cu3O7PrBa2Cu3O7 multilayers

✍ Scribed by B.R. Zhao; X.G. Qiu; S.Q. Guo; J.L. Zhang; P. Xu; Y.Z. Zhang; Y.Y. Zhao; L. Li

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 741 KB
• Volume: 204
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(93)91018-q

✦ Synopsis

The superconductivity of YBaQtsO,/PrBarCu,O, (YBCO/PBCO) multilayers has been studied under parallel and perpendicular magnetic fields H ranging from 0 to 7 T. The resistive transitions of the selected [YBCO/PBCO]s of 48 A/ 100 A and 48 A/ 12 A have been investigated in detail. For both systems the linear behavior of Hcz( T) versus T was found near r,; when the temperature T decreases and the magnetic field increases, the He2 (T) versus T curves show non-linear behavior. It is interesting to note that in the 48 A/ 100 A system when H> 5 T, the slope of the H,,(T) versus T curve increases rapidly and approaches -20 T/K. This behavior implies that the r, of the 48 A/l00 A system is almost independent of the magnetic field in the highfield region. The above phenomena may be attributed to the dimensional crossover of the superconductivity which will be discussed under the behavior of the G-L coherence length t;(T), and the proximity effect between YBCO and PBCO layers.