Effects of elemental substitution involving V and Cr on superconductivity of (Tl,Bi)Sr2(Ca,Y)Cu2O7 ceramics

Nasri A. Hamid, B. Musa, A. K. Yahya, M. H. Jumali, R. Abd-Shukor

Research output: Contribution to journalConference article

12 Citations (Scopus)

Abstract

Cr and V substituted Tl1212 type phase high temperature superconductors with nominal starting compositions Tl0.9Bi0.1Sr 2-xCrxCa0.9Y0.1Cu2O 7 (x=0-0.5) and Tl0.9Bi0.1Sr 2-yVyCa0.9Y0.1Cu2O 7 (y=0-0.5) have been prepared and characterized. Powder X-ray diffraction patterns showed all samples consist of major 1212 phase and minor 1201 phase. For Tl0.9Bi0.1Sr2-xCr xCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (x=0-0.3) to semi-metallic behavior (x=0.4) and semiconductor-like behavior (x=0.5). Tczero gradually increased from 50K (x=0) to a maximum value of 78K at x=0.3 before decreasing with further Cr substitution. The x=0.5 sample was non-superconducting. For Tl0.9Bi0.1Sr2-yV yCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (y=0-0.3) to semi-metallic behavior (y=0.4) and semiconductor-like behavior (y=0.5). Tczero increased from 50K (y=0) to a maximum value of 76K (y=0.2) before decreasing to 62K (y=0.3). Samples with y=0.4 and 0.5 were non-superconducting. The effects of Cr and V substitutions are discussed in terms of ionic radius of dopants and the concept of average Cu valence.

Original languageEnglish
Pages (from-to)1585-1589
Number of pages5
JournalCeramics International
Volume30
Issue number7
DOIs
Publication statusPublished - 08 Sep 2004
Event3rd Asian Meeting on Electroceramics - Singapore, Singapore
Duration: 07 Dec 200311 Dec 2003

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Superconductivity
Substitution reactions
Semiconductor materials
High temperature superconductors
Diffraction patterns
Doping (additives)
Powders
X rays
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

A. Hamid, Nasri ; Musa, B. ; Yahya, A. K. ; Jumali, M. H. ; Abd-Shukor, R. / Effects of elemental substitution involving V and Cr on superconductivity of (Tl,Bi)Sr2(Ca,Y)Cu2O7 ceramics. In: Ceramics International. 2004 ; Vol. 30, No. 7. pp. 1585-1589.
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abstract = "Cr and V substituted Tl1212 type phase high temperature superconductors with nominal starting compositions Tl0.9Bi0.1Sr 2-xCrxCa0.9Y0.1Cu2O 7 (x=0-0.5) and Tl0.9Bi0.1Sr 2-yVyCa0.9Y0.1Cu2O 7 (y=0-0.5) have been prepared and characterized. Powder X-ray diffraction patterns showed all samples consist of major 1212 phase and minor 1201 phase. For Tl0.9Bi0.1Sr2-xCr xCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (x=0-0.3) to semi-metallic behavior (x=0.4) and semiconductor-like behavior (x=0.5). Tczero gradually increased from 50K (x=0) to a maximum value of 78K at x=0.3 before decreasing with further Cr substitution. The x=0.5 sample was non-superconducting. For Tl0.9Bi0.1Sr2-yV yCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (y=0-0.3) to semi-metallic behavior (y=0.4) and semiconductor-like behavior (y=0.5). Tczero increased from 50K (y=0) to a maximum value of 76K (y=0.2) before decreasing to 62K (y=0.3). Samples with y=0.4 and 0.5 were non-superconducting. The effects of Cr and V substitutions are discussed in terms of ionic radius of dopants and the concept of average Cu valence.",
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Effects of elemental substitution involving V and Cr on superconductivity of (Tl,Bi)Sr2(Ca,Y)Cu2O7 ceramics. / A. Hamid, Nasri; Musa, B.; Yahya, A. K.; Jumali, M. H.; Abd-Shukor, R.

In: Ceramics International, Vol. 30, No. 7, 08.09.2004, p. 1585-1589.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Effects of elemental substitution involving V and Cr on superconductivity of (Tl,Bi)Sr2(Ca,Y)Cu2O7 ceramics

AU - A. Hamid, Nasri

AU - Musa, B.

AU - Yahya, A. K.

AU - Jumali, M. H.

AU - Abd-Shukor, R.

PY - 2004/9/8

Y1 - 2004/9/8

N2 - Cr and V substituted Tl1212 type phase high temperature superconductors with nominal starting compositions Tl0.9Bi0.1Sr 2-xCrxCa0.9Y0.1Cu2O 7 (x=0-0.5) and Tl0.9Bi0.1Sr 2-yVyCa0.9Y0.1Cu2O 7 (y=0-0.5) have been prepared and characterized. Powder X-ray diffraction patterns showed all samples consist of major 1212 phase and minor 1201 phase. For Tl0.9Bi0.1Sr2-xCr xCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (x=0-0.3) to semi-metallic behavior (x=0.4) and semiconductor-like behavior (x=0.5). Tczero gradually increased from 50K (x=0) to a maximum value of 78K at x=0.3 before decreasing with further Cr substitution. The x=0.5 sample was non-superconducting. For Tl0.9Bi0.1Sr2-yV yCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (y=0-0.3) to semi-metallic behavior (y=0.4) and semiconductor-like behavior (y=0.5). Tczero increased from 50K (y=0) to a maximum value of 76K (y=0.2) before decreasing to 62K (y=0.3). Samples with y=0.4 and 0.5 were non-superconducting. The effects of Cr and V substitutions are discussed in terms of ionic radius of dopants and the concept of average Cu valence.

AB - Cr and V substituted Tl1212 type phase high temperature superconductors with nominal starting compositions Tl0.9Bi0.1Sr 2-xCrxCa0.9Y0.1Cu2O 7 (x=0-0.5) and Tl0.9Bi0.1Sr 2-yVyCa0.9Y0.1Cu2O 7 (y=0-0.5) have been prepared and characterized. Powder X-ray diffraction patterns showed all samples consist of major 1212 phase and minor 1201 phase. For Tl0.9Bi0.1Sr2-xCr xCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (x=0-0.3) to semi-metallic behavior (x=0.4) and semiconductor-like behavior (x=0.5). Tczero gradually increased from 50K (x=0) to a maximum value of 78K at x=0.3 before decreasing with further Cr substitution. The x=0.5 sample was non-superconducting. For Tl0.9Bi0.1Sr2-yV yCa0.9Y0.1Cu2O7, normal state resistance changes from metallic behavior (y=0-0.3) to semi-metallic behavior (y=0.4) and semiconductor-like behavior (y=0.5). Tczero increased from 50K (y=0) to a maximum value of 76K (y=0.2) before decreasing to 62K (y=0.3). Samples with y=0.4 and 0.5 were non-superconducting. The effects of Cr and V substitutions are discussed in terms of ionic radius of dopants and the concept of average Cu valence.

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