Formation and fluctuation-induced conductivity of (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1-0.7) superconductor

S. S O Farhat, Roslan Abd. Shukor

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Abstract

The (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1, 0.2, 0.3, 0.4, 0.5, and 0.7) samples were prepared by the solid-state reaction method. The samples were studied by powder X-ray diffraction method, electrical resistance measurements and energy dispersive X-ray analysis (EDX). All samples showed a dominant Tl-1212 phase with volume fraction approximately 85%. The Aslamazov-Larkin (AL) theory was used to analyze the excess conductivity. The dimension of fluctuation induced conductivity λ was also determined using the AL theory. The coherence length ∈c(0), Josephson coupling J, and anisotropy γ = (∈ab(0)/∈c(0)) of the samples was calculated using the Lawrence-Donaich (LD) theory. Substituting Bi into (Tl1-xBix)Sr2CaCu2O7-δ (Tl-1212) caused an initial increase in the zero-resistance-temperature (Tc zero). The samples with x = 0.3 and 0.4 showed the highest Tc onset (101 K). Excess conductivity analyses showed that Bi substitution induced 2D-to-3D conductivity transition with the highest transition temperature, T2D-3D observed at x = 0.3. The shortest coherence length, ∈c(0) and lowest interplanar coupling, J was observed in the x = 0.7 which is in the under-doped state.

Original languageEnglish
Pages (from-to)5973-5982
Number of pages10
JournalInternational Journal of Electrochemical Science
Volume11
Issue number7
DOIs
Publication statusPublished - 2016

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Superconducting materials
Acoustic impedance
Energy dispersive X ray analysis
Solid state reactions
X ray powder diffraction
Superconducting transition temperature
Volume fraction
Anisotropy
Substitution reactions
Temperature

Keywords

  • Anisotropy
  • Coherence length
  • Superconductor
  • Tl-1212 type phase

ASJC Scopus subject areas

  • Electrochemistry

Cite this

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title = "Formation and fluctuation-induced conductivity of (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1-0.7) superconductor",
abstract = "The (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1, 0.2, 0.3, 0.4, 0.5, and 0.7) samples were prepared by the solid-state reaction method. The samples were studied by powder X-ray diffraction method, electrical resistance measurements and energy dispersive X-ray analysis (EDX). All samples showed a dominant Tl-1212 phase with volume fraction approximately 85{\%}. The Aslamazov-Larkin (AL) theory was used to analyze the excess conductivity. The dimension of fluctuation induced conductivity λ was also determined using the AL theory. The coherence length ∈c(0), Josephson coupling J, and anisotropy γ = (∈ab(0)/∈c(0)) of the samples was calculated using the Lawrence-Donaich (LD) theory. Substituting Bi into (Tl1-xBix)Sr2CaCu2O7-δ (Tl-1212) caused an initial increase in the zero-resistance-temperature (Tc zero). The samples with x = 0.3 and 0.4 showed the highest Tc onset (101 K). Excess conductivity analyses showed that Bi substitution induced 2D-to-3D conductivity transition with the highest transition temperature, T2D-3D observed at x = 0.3. The shortest coherence length, ∈c(0) and lowest interplanar coupling, J was observed in the x = 0.7 which is in the under-doped state.",
keywords = "Anisotropy, Coherence length, Superconductor, Tl-1212 type phase",
author = "Farhat, {S. S O} and {Abd. Shukor}, Roslan",
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T1 - Formation and fluctuation-induced conductivity of (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1-0.7) superconductor

AU - Farhat, S. S O

AU - Abd. Shukor, Roslan

PY - 2016

Y1 - 2016

N2 - The (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1, 0.2, 0.3, 0.4, 0.5, and 0.7) samples were prepared by the solid-state reaction method. The samples were studied by powder X-ray diffraction method, electrical resistance measurements and energy dispersive X-ray analysis (EDX). All samples showed a dominant Tl-1212 phase with volume fraction approximately 85%. The Aslamazov-Larkin (AL) theory was used to analyze the excess conductivity. The dimension of fluctuation induced conductivity λ was also determined using the AL theory. The coherence length ∈c(0), Josephson coupling J, and anisotropy γ = (∈ab(0)/∈c(0)) of the samples was calculated using the Lawrence-Donaich (LD) theory. Substituting Bi into (Tl1-xBix)Sr2CaCu2O7-δ (Tl-1212) caused an initial increase in the zero-resistance-temperature (Tc zero). The samples with x = 0.3 and 0.4 showed the highest Tc onset (101 K). Excess conductivity analyses showed that Bi substitution induced 2D-to-3D conductivity transition with the highest transition temperature, T2D-3D observed at x = 0.3. The shortest coherence length, ∈c(0) and lowest interplanar coupling, J was observed in the x = 0.7 which is in the under-doped state.

AB - The (Tl1-xBix)Sr2CaCu2O7-δ (x = 0.1, 0.2, 0.3, 0.4, 0.5, and 0.7) samples were prepared by the solid-state reaction method. The samples were studied by powder X-ray diffraction method, electrical resistance measurements and energy dispersive X-ray analysis (EDX). All samples showed a dominant Tl-1212 phase with volume fraction approximately 85%. The Aslamazov-Larkin (AL) theory was used to analyze the excess conductivity. The dimension of fluctuation induced conductivity λ was also determined using the AL theory. The coherence length ∈c(0), Josephson coupling J, and anisotropy γ = (∈ab(0)/∈c(0)) of the samples was calculated using the Lawrence-Donaich (LD) theory. Substituting Bi into (Tl1-xBix)Sr2CaCu2O7-δ (Tl-1212) caused an initial increase in the zero-resistance-temperature (Tc zero). The samples with x = 0.3 and 0.4 showed the highest Tc onset (101 K). Excess conductivity analyses showed that Bi substitution induced 2D-to-3D conductivity transition with the highest transition temperature, T2D-3D observed at x = 0.3. The shortest coherence length, ∈c(0) and lowest interplanar coupling, J was observed in the x = 0.7 which is in the under-doped state.

KW - Anisotropy

KW - Coherence length

KW - Superconductor

KW - Tl-1212 type phase

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