TY - JOUR
T1 - Intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors
T2 - Temperature dependence in low magnetic fields
AU - Paasi, Jaakko
AU - Kottman, Peter
AU - Majoroš, Milan
AU - Plecháček, Vladimir
PY - 1998/9
Y1 - 1998/9
N2 - The temperature dependence of intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors was studied in low magnetic fields. In order to distinguish the two kinds of currents, the experiments were performed with two samples of similar grains: a bulk sample of well-coupled grains, and a sample without intergranular coupling (powder sample). The temperature dependence of intragranular currents exhibited a behaviour typical for S-N-S (superconductor-normal metal-superconductor) junctions. For intergranular currents the temperature dependence suggested a limitation due to thermally activated flux creep in the space between the superconducting grains.
AB - The temperature dependence of intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors was studied in low magnetic fields. In order to distinguish the two kinds of currents, the experiments were performed with two samples of similar grains: a bulk sample of well-coupled grains, and a sample without intergranular coupling (powder sample). The temperature dependence of intragranular currents exhibited a behaviour typical for S-N-S (superconductor-normal metal-superconductor) junctions. For intergranular currents the temperature dependence suggested a limitation due to thermally activated flux creep in the space between the superconducting grains.
KW - Critical current density
KW - Granular superconductivity
KW - Magnetization
UR - http://www.scopus.com/inward/record.url?scp=0032135913&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(98)00321-9
DO - 10.1016/S0921-4534(98)00321-9
M3 - Article
AN - SCOPUS:0032135913
SN - 0921-4534
VL - 305
SP - 21
EP - 25
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-2
ER -