G. Hilscher et al., MAGNETISM AND SUPERCONDUCTIVITY IN SR2RYCE0.5MCU2O10-DELTA (R=PR, ND,SM, EU, GD M=NB,TA), Physica. B, Condensed matter, 194, 1994, pp. 2243-2244
We present magnetic and specific heat measurements of the series Sr2Ry
Ce0.5MCu2O10-delta (R = Pr, Nd, Sm, Eu, Gd; M = Nb, Ta). Superconducti
vity occurs for y > 0.8 (R = Nd, Sm, Eu), however, for Gd only in comb
ination with M = Nb, while the corresponding Pr compounds are found to
be nonsuperconducting.