H. Tang et al., ANOMALIES IN THE M(T) CURVES OF THE CERAMIC SUPERCONDUCTOR Y0.8PR0.2BA2CU2.90LI0.10O7.DELTA, Physica. C, Superconductivity, 282, 1997, pp. 1295-1296
In the present study, some anomalies, the paramagnetic Meissner effect
(PME), the diamagnetic dip effect (DDE) in the ZFC and FC M(T) curves
and the glass transition, were observed for the ceramic superconducto
r Y0.8Pr0.2Ba2Cu2.90Li0.10O7-delta. The PME vanishes at fields higher
than 5 Oe. The DDE and the glass transition peak shift to lower temper
ature with increasing field, accompanied by a slight broadening of DDE
. All of these anomalies are discussed in relation to the Josephson co
upling loops in this superconductor sample.