Topological pinning and flux flow in ceramic superconductors

D. López; R. Decca; F. de la Cruz

doi:10.1016/0038-1098(91)90451-Z

Topological pinning and flux flow in ceramic superconductors

D. López, R. Decca, F. de la Cruz

Electrical Engineering

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

12 Scopus citations

Abstract

The transport current dissipation in the high T_c superconducting ceramic La_1.85Sr_0.15CuO_4-δ shows a sin² Θ voltage dependence where Θ is the angle between the transport current and the magnetic field. This result and the experimental evidence of an angle independent critical current cannot be explained by the conventional description of flux motion in homogeneous type II superconductors. The results are analyzed in the framework of a granular system where pinning is induced by the topological distribution of current flowing through a multiply connected medium. The dissipation in the superconducting state is found to be due to two additive contributions, one induced by the movement of magnetic flux and the other associated to dissipation in the Josephson junction.

Original language	English (US)
Pages (from-to)	959-962
Number of pages	4
Journal	Solid State Communications
Volume	79
Issue number	11
DOIs	https://doi.org/10.1016/0038-1098(91)90451-Z
State	Published - Sep 1991

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/0038-1098(91)90451-Z

Cite this

@article{2f0acb2969094f4cb83e60ef191d916b,

title = "Topological pinning and flux flow in ceramic superconductors",

abstract = "The transport current dissipation in the high Tc superconducting ceramic La1.85Sr0.15CuO4-δ shows a sin2 Θ voltage dependence where Θ is the angle between the transport current and the magnetic field. This result and the experimental evidence of an angle independent critical current cannot be explained by the conventional description of flux motion in homogeneous type II superconductors. The results are analyzed in the framework of a granular system where pinning is induced by the topological distribution of current flowing through a multiply connected medium. The dissipation in the superconducting state is found to be due to two additive contributions, one induced by the movement of magnetic flux and the other associated to dissipation in the Josephson junction.",

author = "D. L{\'o}pez and R. Decca and {de la Cruz}, F.",

note = "Funding Information: * Fellowship holder of the Fundaci6n del banco de la Provincia de Rio Negro. * Fellowship holder ofthe Consejo Nacional de Inves-tigaciones Cientificas y Trcnicas of Argentina.",

year = "1991",

month = sep,

doi = "10.1016/0038-1098(91)90451-Z",

language = "English (US)",

volume = "79",

pages = "959--962",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

number = "11",

}

TY - JOUR

T1 - Topological pinning and flux flow in ceramic superconductors

AU - López, D.

AU - Decca, R.

AU - de la Cruz, F.

N1 - Funding Information: * Fellowship holder of the Fundaci6n del banco de la Provincia de Rio Negro. * Fellowship holder ofthe Consejo Nacional de Inves-tigaciones Cientificas y Trcnicas of Argentina.

PY - 1991/9

Y1 - 1991/9

N2 - The transport current dissipation in the high Tc superconducting ceramic La1.85Sr0.15CuO4-δ shows a sin2 Θ voltage dependence where Θ is the angle between the transport current and the magnetic field. This result and the experimental evidence of an angle independent critical current cannot be explained by the conventional description of flux motion in homogeneous type II superconductors. The results are analyzed in the framework of a granular system where pinning is induced by the topological distribution of current flowing through a multiply connected medium. The dissipation in the superconducting state is found to be due to two additive contributions, one induced by the movement of magnetic flux and the other associated to dissipation in the Josephson junction.

AB - The transport current dissipation in the high Tc superconducting ceramic La1.85Sr0.15CuO4-δ shows a sin2 Θ voltage dependence where Θ is the angle between the transport current and the magnetic field. This result and the experimental evidence of an angle independent critical current cannot be explained by the conventional description of flux motion in homogeneous type II superconductors. The results are analyzed in the framework of a granular system where pinning is induced by the topological distribution of current flowing through a multiply connected medium. The dissipation in the superconducting state is found to be due to two additive contributions, one induced by the movement of magnetic flux and the other associated to dissipation in the Josephson junction.

UR - http://www.scopus.com/inward/record.url?scp=0026223922&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026223922&partnerID=8YFLogxK

U2 - 10.1016/0038-1098(91)90451-Z

DO - 10.1016/0038-1098(91)90451-Z

M3 - Article

AN - SCOPUS:0026223922

SN - 0038-1098

VL - 79

SP - 959

EP - 962

JO - Solid State Communications

JF - Solid State Communications

IS - 11

ER -

Topological pinning and flux flow in ceramic superconductors

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this