Non-ohmic I-V behaviour in granular YBa2Cu3O7-δ and (Bi, Pb)2Sr2Ca2Cu3O10 high-Tc superconductors

Kh A. Ziq; M. M. Abdelhadi; N. M. Hamdan; A. S. Al Harthi

doi:10.1088/0953-2048/9/3/010

Non-ohmic I-V behaviour in granular YBa₂Cu₃O_7-δ and (Bi, Pb)₂Sr₂Ca₂Cu₃O₁₀ high-T_c superconductors

Kh A. Ziq^*, M. M. Abdelhadi, N. M. Hamdan, A. S. Al Harthi

^*Corresponding author for this work

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

6 Scopus citations

Abstract

Current-voltage measurements performed on granular YBa₂Cu₃O_7-δ and (Bi, Pb)₂Sr₂Ca₂Cu₃O₁₀ high-T_c superconducting samples below their transition temperatures revealed a power law (V = αI^β) over a wide range of applied voltage. The exponent β decreases linearly with increasing temperature, deviating from linearity at temperature T_nl lower than T_c. Moreover the resistivity (ρ) exhibits a slope change in a log(ρ)-log(1 - T/T_c) plot at a temperature T* < T_c. We argue that T_nl and T* may reflect changes in the dynamics of the intergranular (or Josephson) vortices just below the superconducting transition temperatures.

Original language	English
Pages (from-to)	192-196
Number of pages	5
Journal	Superconductor Science and Technology
Volume	9
Issue number	3
DOIs	https://doi.org/10.1088/0953-2048/9/3/010
State	Published - Mar 1996

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1088/0953-2048/9/3/010

Cite this

@article{db77019d7e0547858ec5112c22c51617,

title = "Non-ohmic I-V behaviour in granular YBa2Cu3O7-δ and (Bi, Pb)2Sr2Ca2Cu3O10 high-Tc superconductors",

abstract = "Current-voltage measurements performed on granular YBa2Cu3O7-δ and (Bi, Pb)2Sr2Ca2Cu3O10 high-Tc superconducting samples below their transition temperatures revealed a power law (V = αIβ) over a wide range of applied voltage. The exponent β decreases linearly with increasing temperature, deviating from linearity at temperature Tnl lower than Tc. Moreover the resistivity (ρ) exhibits a slope change in a log(ρ)-log(1 - T/Tc) plot at a temperature T* < Tc. We argue that Tnl and T* may reflect changes in the dynamics of the intergranular (or Josephson) vortices just below the superconducting transition temperatures.",

author = "Ziq, {Kh A.} and Abdelhadi, {M. M.} and Hamdan, {N. M.} and {Al Harthi}, {A. S.}",

year = "1996",

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journal = "Superconductor Science and Technology",

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T1 - Non-ohmic I-V behaviour in granular YBa2Cu3O7-δ and (Bi, Pb)2Sr2Ca2Cu3O10 high-Tc superconductors

AU - Ziq, Kh A.

AU - Abdelhadi, M. M.

AU - Hamdan, N. M.

AU - Al Harthi, A. S.

PY - 1996/3

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N2 - Current-voltage measurements performed on granular YBa2Cu3O7-δ and (Bi, Pb)2Sr2Ca2Cu3O10 high-Tc superconducting samples below their transition temperatures revealed a power law (V = αIβ) over a wide range of applied voltage. The exponent β decreases linearly with increasing temperature, deviating from linearity at temperature Tnl lower than Tc. Moreover the resistivity (ρ) exhibits a slope change in a log(ρ)-log(1 - T/Tc) plot at a temperature T* < Tc. We argue that Tnl and T* may reflect changes in the dynamics of the intergranular (or Josephson) vortices just below the superconducting transition temperatures.

AB - Current-voltage measurements performed on granular YBa2Cu3O7-δ and (Bi, Pb)2Sr2Ca2Cu3O10 high-Tc superconducting samples below their transition temperatures revealed a power law (V = αIβ) over a wide range of applied voltage. The exponent β decreases linearly with increasing temperature, deviating from linearity at temperature Tnl lower than Tc. Moreover the resistivity (ρ) exhibits a slope change in a log(ρ)-log(1 - T/Tc) plot at a temperature T* < Tc. We argue that Tnl and T* may reflect changes in the dynamics of the intergranular (or Josephson) vortices just below the superconducting transition temperatures.

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