Intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors: Temperature dependence in low magnetic fields

Jaakko Paasi; Peter Kottman; Milan Majoroš; Vladimir Plecháček

doi:10.1016/S0921-4534(98)00321-9

Intergranular and intragranular currents in (Bi,Pb)₂Sr₂Ca₂Cu₃O_10+x superconductors: Temperature dependence in low magnetic fields

Jaakko Paasi^*, Peter Kottman, Milan Majoroš, Vladimir Plecháček

^*Corresponding author for this work

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

5 Citations (Scopus)

Abstract

The temperature dependence of intergranular and intragranular currents in (Bi,Pb)₂Sr₂Ca₂Cu₃O_10+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.

Original language	English
Pages (from-to)	21-25
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	305
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(98)00321-9
Publication status	Published - Sept 1998
MoE publication type	A1 Journal article-refereed

Funding

The work was supported by the Academy of Finland and the Slovak Grant Agency VEGA, grant number 2/4052/97.

Keywords

Critical current density
Granular superconductivity
Magnetization

Access to Document

10.1016/S0921-4534(98)00321-9

Cite this

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title = "Intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors: Temperature dependence in low magnetic fields",

abstract = "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.",

keywords = "Critical current density, Granular superconductivity, Magnetization",

author = "Jaakko Paasi and Peter Kottman and Milan Majoro{\v s} and Vladimir Plech{\'a}{\v c}ek",

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T1 - Intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors

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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

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