Anomalous ac magnetic susceptibility of high-temperature Y Ba2 Cu3 O7-δ superconductors

D. X. Chen; E. Pardo; A. Sanchez; S. S. Wang; Z. H. Han; E. Bartolome; T. Puig; X. Obradors

doi:https://doi.org/10.1103/PhysRevB.72.052504

Anomalous ac magnetic susceptibility of high-temperature Y Ba2 Cu3 O7-δ superconductors

D. X. Chen, E. Pardo, A. Sanchez, S. S. Wang, Z. H. Han, E. Bartolome, T. Puig, X. Obradors

Department of Physics

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Abstract

An anomalous effect in the low-field ac susceptibility of Y Ba2 Cu3 O7-δ superconductors with strong frequency dependence is presented. This phenomenon appears in samples whose intergranular currents flow with low values, and its existence is analyzed in terms of the presense of Josephson vortices and their thermally activated creep of Kim-Anderson type with small pinning potential. Its existence highlights a possible problem in the research and development of high-temperature superconductors; some materials with high Jc defined by E= Ec = 10-4 Vm may still have a large resistivity at lower E. © 2005 The American Physical Society.

Original language	English
Article number	052504
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
DOIs	https://doi.org/10.1103/PhysRevB.72.052504
Publication status	Published - 1 Aug 2005

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title = "Anomalous ac magnetic susceptibility of high-temperature Y Ba2 Cu3 O7-δ superconductors",

abstract = "An anomalous effect in the low-field ac susceptibility of Y Ba2 Cu3 O7-δ superconductors with strong frequency dependence is presented. This phenomenon appears in samples whose intergranular currents flow with low values, and its existence is analyzed in terms of the presense of Josephson vortices and their thermally activated creep of Kim-Anderson type with small pinning potential. Its existence highlights a possible problem in the research and development of high-temperature superconductors; some materials with high Jc defined by E= Ec = 10-4 Vm may still have a large resistivity at lower E. {\textcopyright} 2005 The American Physical Society.",

author = "Chen, {D. X.} and E. Pardo and A. Sanchez and Wang, {S. S.} and Han, {Z. H.} and E. Bartolome and T. Puig and X. Obradors",

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T1 - Anomalous ac magnetic susceptibility of high-temperature Y Ba2 Cu3 O7-δ superconductors

AU - Chen, D. X.

AU - Pardo, E.

AU - Sanchez, A.

AU - Wang, S. S.

AU - Han, Z. H.

AU - Bartolome, E.

AU - Puig, T.

AU - Obradors, X.

PY - 2005/8/1

Y1 - 2005/8/1

N2 - An anomalous effect in the low-field ac susceptibility of Y Ba2 Cu3 O7-δ superconductors with strong frequency dependence is presented. This phenomenon appears in samples whose intergranular currents flow with low values, and its existence is analyzed in terms of the presense of Josephson vortices and their thermally activated creep of Kim-Anderson type with small pinning potential. Its existence highlights a possible problem in the research and development of high-temperature superconductors; some materials with high Jc defined by E= Ec = 10-4 Vm may still have a large resistivity at lower E. © 2005 The American Physical Society.

AB - An anomalous effect in the low-field ac susceptibility of Y Ba2 Cu3 O7-δ superconductors with strong frequency dependence is presented. This phenomenon appears in samples whose intergranular currents flow with low values, and its existence is analyzed in terms of the presense of Josephson vortices and their thermally activated creep of Kim-Anderson type with small pinning potential. Its existence highlights a possible problem in the research and development of high-temperature superconductors; some materials with high Jc defined by E= Ec = 10-4 Vm may still have a large resistivity at lower E. © 2005 The American Physical Society.

U2 - https://doi.org/10.1103/PhysRevB.72.052504

DO - https://doi.org/10.1103/PhysRevB.72.052504

M3 - Article

VL - 72

M1 - 052504

ER -

Anomalous ac magnetic susceptibility of high-temperature Y Ba2 Cu3 O7-δ superconductors

Abstract

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