Rg. Goodrich et al., ORIGIN OF THE VARIATION OF T-C WITH SUPERCONDUCTING LAYER THICKNESS AND SEPARATION IN YBA2CU3O7-X PRBA2CU3O7 SUPERLATTICES/, Physical review. B, Condensed matter, 56(22), 1997, pp. 14299-14302
We have investigated the superconducting (SC) properties of ultra-thin
YBa2Cu3O7-x layers in YBa2Cu3O7-x/PrBa2Cu3O7 superlattices in which t
he coupling between adjacent YBa2Cu3O7-x layers is modulated by varyin
g thicknesses of insulating PrBa2Cu3O7. In particular, we have formula
ted a phenomenological model that accounts for the dependence of the Y
Ba2Cu3O7-x transition temperature on both the thickness of and the sep
aration between YBa2Cu3O7-x layers. The results of our analysis are co
mpared with previous studies of conventional low-T-c thin film systems
.