Superconductivity in the chromium-doped Tl-1212 phase (Tl0.8M0.2)Sr2(Ca1-xCrx)Cu2O7 (M = Bi and In)

Roslan Abd. Shukor, C. H. Tiew

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The single TlO layer TlSr2Can-1CunO2n+3 with n = 2, often called Tl-1212 phase can be extensively subjected to elemental substitutions forming numerous superconducting materials in the family. In this paper, materials with nominal starting compositions (Tl0.8M0.2)Sr2(Ca1-xCrx)Cu2O7 with M = Bi and In have been prepared and investigated by the d.c. electrical resistance method and powder X-ray diffraction analyses. Most of the samples showed the Tl-1212 as the major phase and 1201 as the minor phase. The Bi-substituted samples showed a higher onset temperature and higher 1212 phase volume fraction compared to the In-substituted materials. The importance of ionic radius of the substituted elements and the effect of melting/volatility point of the starting components on the onset critical transition temperature (Tc,onset) and phase formation is discussed.

Original languageEnglish
Pages (from-to)109-112
Number of pages4
JournalJournal of Materials Science: Materials in Electronics
Volume10
Issue number2
DOIs
Publication statusPublished - Apr 1999

Fingerprint

Chromium
Superconductivity
chromium
superconductivity
Acoustic impedance
volatility
electrical resistance
X ray powder diffraction
Superconducting materials
Superconducting transition temperature
Melting point
Volume fraction
critical temperature
Substitution reactions
transition temperature
melting
substitutes
radii
Chemical analysis
diffraction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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abstract = "The single TlO layer TlSr2Can-1CunO2n+3 with n = 2, often called Tl-1212 phase can be extensively subjected to elemental substitutions forming numerous superconducting materials in the family. In this paper, materials with nominal starting compositions (Tl0.8M0.2)Sr2(Ca1-xCrx)Cu2O7 with M = Bi and In have been prepared and investigated by the d.c. electrical resistance method and powder X-ray diffraction analyses. Most of the samples showed the Tl-1212 as the major phase and 1201 as the minor phase. The Bi-substituted samples showed a higher onset temperature and higher 1212 phase volume fraction compared to the In-substituted materials. The importance of ionic radius of the substituted elements and the effect of melting/volatility point of the starting components on the onset critical transition temperature (Tc,onset) and phase formation is discussed.",
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AU - Tiew, C. H.

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N2 - The single TlO layer TlSr2Can-1CunO2n+3 with n = 2, often called Tl-1212 phase can be extensively subjected to elemental substitutions forming numerous superconducting materials in the family. In this paper, materials with nominal starting compositions (Tl0.8M0.2)Sr2(Ca1-xCrx)Cu2O7 with M = Bi and In have been prepared and investigated by the d.c. electrical resistance method and powder X-ray diffraction analyses. Most of the samples showed the Tl-1212 as the major phase and 1201 as the minor phase. The Bi-substituted samples showed a higher onset temperature and higher 1212 phase volume fraction compared to the In-substituted materials. The importance of ionic radius of the substituted elements and the effect of melting/volatility point of the starting components on the onset critical transition temperature (Tc,onset) and phase formation is discussed.

AB - The single TlO layer TlSr2Can-1CunO2n+3 with n = 2, often called Tl-1212 phase can be extensively subjected to elemental substitutions forming numerous superconducting materials in the family. In this paper, materials with nominal starting compositions (Tl0.8M0.2)Sr2(Ca1-xCrx)Cu2O7 with M = Bi and In have been prepared and investigated by the d.c. electrical resistance method and powder X-ray diffraction analyses. Most of the samples showed the Tl-1212 as the major phase and 1201 as the minor phase. The Bi-substituted samples showed a higher onset temperature and higher 1212 phase volume fraction compared to the In-substituted materials. The importance of ionic radius of the substituted elements and the effect of melting/volatility point of the starting components on the onset critical transition temperature (Tc,onset) and phase formation is discussed.

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