An. Timoshevsky et al., ELECTRONIC-STRUCTURE AND SUPERCONDUCTING PROPERTIES OF Y1-XPRXBA2CU3O7-DELTA COMPOUND, UKRAINSKII FIZICHESKII ZHURNAL, 38(8), 1993, pp. 1236-1239
It is found out that the fraction of superconducting phase is decrease
d when Y atoms are replaced by Pr atoms. It is associated with the fac
t that 4f2 states of Pr atoms get to the Fermi level and sharply chang
e hybridization relations between the electron states of different ato
ms.