TY - JOUR
T1 - Anomalous pinning behavior in slightly-oxygen-deficient Ba2YCu3O7-δ
AU - van Dover, R. B.
AU - Schneemeyer, L. F.
AU - Felder, R. J.
AU - Waszczak, J. V.
PY - 1992/4/1
Y1 - 1992/4/1
N2 - Single crystals of Ba2YCu3O7-δ were equilibrated at ∼400-500°C to obtain δ∼0.05-0.15, with Tc87-83 K, respectively. Despite the consequent increase in point defects, the field-broadened resistive transition (B|c) ofhe crystal with Tc∼83 K indicates a marked reduction in the pinning energy compared with the fully oxidized case. The c-axis coherence length, inferred from the fluctuation conductivity, does not change. We speculate that the pinning energy decrease is due to a decrease in coupling between superconducting CuO planes due to proximity-effect reduction of the order parameter on CuO chains.
AB - Single crystals of Ba2YCu3O7-δ were equilibrated at ∼400-500°C to obtain δ∼0.05-0.15, with Tc87-83 K, respectively. Despite the consequent increase in point defects, the field-broadened resistive transition (B|c) ofhe crystal with Tc∼83 K indicates a marked reduction in the pinning energy compared with the fully oxidized case. The c-axis coherence length, inferred from the fluctuation conductivity, does not change. We speculate that the pinning energy decrease is due to a decrease in coupling between superconducting CuO planes due to proximity-effect reduction of the order parameter on CuO chains.
UR - http://www.scopus.com/inward/record.url?scp=0026852072&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(92)90862-7
DO - 10.1016/0921-4534(92)90862-7
M3 - Article
AN - SCOPUS:0026852072
SN - 0921-4534
VL - 193
SP - 13
EP - 19
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 1-2
ER -