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Origin of the variation of Tc with superconducting layer thickness and separation in YBa2Cu3O7 x /PrBa2Cu3O7 superlattices
 

Summary: Origin of the variation of Tc with superconducting layer thickness and separation
in YBa2Cu3O7 x /PrBa2Cu3O7 superlattices
R. G. Goodrich and P. W. Adams
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001
D. H. Lowndes and D. P. Norton
Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6056
Received 15 September 1997
We have investigated the superconducting SC properties of ultra-thin YBa2Cu3O7 x layers in
YBa2Cu3O7 x /PrBa2Cu3O7 superlattices in which the coupling between adjacent YBa2Cu3O7 x layers is
modulated by varying thicknesses of insulating PrBa2Cu3O7. In particular, we have formulated a phenomeno-
logical model that accounts for the dependence of the YBa2Cu3O7 x transition temperature on both the
thickness of and the separation between YBa2Cu3O7 x layers. The results of our analysis are compared with
previous studies of conventional low-Tc thin film systems. S0163-1829 97 51446-9
It is now well known that the superconducting transition
temperature, Tc , of thin amorphous, elemental films con-
ventional low-Tc superconductors is suppressed as the film
thickness is decreased. However, recent measurements of the
Tc of isolated c-axis oriented YBa2Cu3O7 x YBCO layers,
separated by insulating layers of PrBa2Cu3O7 in
YBa2Cu3O7 x /PrBa2Cu3O7 YBCO/PrBCO superlattices

  

Source: Adams, Philip W. - Department of Physics and Astronomy, Louisiana State University

 

Collections: Materials Science