Superconducting and normal state behaviors of (Tl,Bi)Sr 2-xTixCa0.9Y0.1Cu2O 7 ceramics

A. K. Yahya, W. F. Abdullah, Mohammad Hafizuddin Jumali, H. Imad, Roslan Abd. Shukor

Research output: Contribution to journalArticle

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Abstract

Effects of Bi and Ti substitutions at Tl and Sr sites, respectively, on superconducting and normal state behaviors of (Tl,Bi)Sr2-xTi xCa0.9Y0.1Cu2O7 (x = 0-0.5) and Tl1-yBiySr1.9Ti0.1Ca 0.9Y0.1Cu2O7 ceramics have been investigated. Temperature-dependent resistance measurements on Tl 0.9Bi0.1Sr2-xTixCa 0.9Y0.1Cu2O7 (x = 0) showed metallic normal state behavior with Tconset of 96 K and Tczero of 61 K. Substitution of Ti caused deterioration of superconductivity and gradual change of normal state resistance from metallic behavior (x = 0-0.3) to semiconductor-like behavior (x = 0.4-0.5). Resistance versus temperature measurements on Tl1-yBiySr1.9Ti 0.1Ca0.9Y0.1Cu2O7 (y = 0-0.6) showed optimum superconductivity for y = 0.3 with Tconset of 98 K and Tczero of 68 K. The effects of Bi and Ti substitutions on superconducting and normal state behaviors of the ceramics are discussed in terms of ionic radius of elements and the concept of average Cu valence.

Original languageEnglish
Pages (from-to)1591-1595
Number of pages5
JournalCeramics International
Volume30
Issue number7
DOIs
Publication statusPublished - 2004

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Substitution reactions
Superconductivity
Temperature measurement
Deterioration
Semiconductor materials
Temperature

Keywords

  • B. Microstructure-final
  • C. Electrical properties
  • C. Superconductivity
  • D. Oxide superconductor

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Superconducting and normal state behaviors of (Tl,Bi)Sr 2-xTixCa0.9Y0.1Cu2O 7 ceramics. / Yahya, A. K.; Abdullah, W. F.; Jumali, Mohammad Hafizuddin; Imad, H.; Abd. Shukor, Roslan.

In: Ceramics International, Vol. 30, No. 7, 2004, p. 1591-1595.

Research output: Contribution to journalArticle

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AU - Imad, H.

AU - Abd. Shukor, Roslan

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