Response of Cu0.5(Tl0.5-y Hgy)Ba 2 Ca3 Zn2 Cu2 O12-δ (y = 0, 0.15, 0.25 and 0.35) superconductors in electric and magnetic fields

Adnan Younis, Shama Seher

Research output: Contribution to journalArticlepeer-review

Abstract

The superconducting properties of the Cu0.5(Tl 0.5-yHgy)Ba2Ca3Zn2Cu 2O12-δ compound have been studied by resistivity and ac magnetic susceptibility measurements. Mercury substitution has been found to improve the superconductivity of the Cu0.5Tl0.5Ba 2Ca3Zn2Cu2O12-δ (CuTl-1234) compound, which is evidenced by the improvement of physical properties such as zero resistivity critical temperature, critical current density and flux pinning. The main objective of the present study was to examine the possible role of Hg in enhancing the superconducting properties of CuTl-1234. Post-annealing of the samples was also carried out at 550 °C in an oxygen atmosphere. The oxygen post-annealing enhanced the intergranular coupling and the superconducting properties of Cu1-xTl x-1234 samples. But ac susceptibility measurements under different magnetic fields show that CuTlHg-1234 has superior flux pinning characteristics as compared to Cu1-xTlx-1234, which make them useful for applications in external magnetic fields.

Original languageEnglish
Article number025701
JournalPhysica Scripta
Volume82
Issue number2
DOIs
Publication statusPublished - Aug 2010
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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