Effects of Bi and Si substitutions on (Tl0.5Bi0.5- xSix)Sr2CaCu2O7 superconductor

J. M. Zubair-Asyraf, A. B.P. Ilhamsyah, R. Abd-Shukor

Research output: Contribution to journalArticle

Abstract

The effects of Bi and Si substitutions on the superconducting properties of (T10.5Bi0.5- xSix)Sr2CaCu2O7 (Tl-1212) for x = 0 to 0.5 were studied. The samples were prepared by the solid-state reaction method. X-ray diffraction patterns showed that lower substitution (x ≤ 0.2) of Si did not affect the formation of Tl-1212 phase. The temperature-dependent electrical resistance measurements showed that the onset transition temperature, Tc-onset and zero transition temperature, Tc-zero for x = 0–0.4 samples was between 91 and 96 K, and 78 and 81 K, respectively. AC susceptibility measurements showed transition temperature, Tc χ’ between 82 and 90 K. The peak temperature, Tp of the imaginary part of the susceptibility, χ” shifted to higher temperatures for x = 0 to 0.3 indicating enhancement of flux pinning and intergranular coupling. Further substitution of Si (x = 0.5) destroyed superconductivity of the Tl-1212 phase demonstrating that although Si can fully substitute Bi at Tl site and form majority (60%) Tl-1212 phase, superconductivity was not achieved. This work showed that Si could act as flux pinning centers for Tl-1212 high-temperature superconductor for low-level substitutions.

Original languageEnglish
Article number103011
JournalCryogenics
Volume105
DOIs
Publication statusPublished - Jan 2020

Fingerprint

Superconducting materials
Substitution reactions
substitutes
Superconducting transition temperature
Flux pinning
Superconductivity
transition temperature
flux pinning
superconductivity
Acoustic impedance
High temperature superconductors
magnetic permeability
Solid state reactions
Temperature
Diffraction patterns
electrical resistance
high temperature superconductors
alternating current
X ray diffraction
diffraction patterns

Keywords

  • Ac susceptibility
  • Critical current density
  • Microstructure
  • Tl-1212 phase

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Effects of Bi and Si substitutions on (Tl0.5Bi0.5- xSix)Sr2CaCu2O7 superconductor. / Zubair-Asyraf, J. M.; Ilhamsyah, A. B.P.; Abd-Shukor, R.

In: Cryogenics, Vol. 105, 103011, 01.2020.

Research output: Contribution to journalArticle

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