Superconductivity of 1212-type phase T1Sr2(Ca,Cr)Cu2O7 and T1Sr2(Sr,Tm)Cu2O7

Roslan Abd. Shukor, C. T. Quah

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Samples with nominal starting compositions T1Sr2(Ca1-xCrx)Cu2O 7 and T1Sr2(Sr1-xTmx)Cu2O 7 were prepared and investigated by electrical resistivity and X-ray powder diffraction methods. Most of the samples have 1212 as the major phase and 1201 as the minor phase. T1Sr2(Ca1-xCrx)Cu2O7 with x = 0 exhibited a non-superconducting metallic behaviour down to 60 K. The sample with x = 0.5 had the highest superconducting onset temperature Tc of about 105 K. The T1Sr2(Sr1-xTmx)Cu2O7 samples with x = 0.5 and 0.6 exhibited the maximum Tc of about 93 K. The optimum average Cu valence for superconductivity was estimated by assuming an ideal 1212 stoichiometry. The importance of ionic radii of the substituted elements for the formation of the 1212 phase is also discussed.

Original languageEnglish
Pages (from-to)54-57
Number of pages4
JournalMaterials Science and Engineering B
Volume23
Issue number1
DOIs
Publication statusPublished - 1994

Fingerprint

Superconductivity
Stoichiometry
X ray powder diffraction
superconductivity
Chemical analysis
Temperature
stoichiometry
valence
electrical resistivity
radii
diffraction
x rays
temperature

ASJC Scopus subject areas

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

Cite this

Superconductivity of 1212-type phase T1Sr2(Ca,Cr)Cu2O7 and T1Sr2(Sr,Tm)Cu2O7 . / Abd. Shukor, Roslan; Quah, C. T.

In: Materials Science and Engineering B, Vol. 23, No. 1, 1994, p. 54-57.

Research output: Contribution to journalArticle

@article{29cb8355ad954454902b7a9f8eb327e3,
title = "Superconductivity of 1212-type phase T1Sr2(Ca,Cr)Cu2O7 and T1Sr2(Sr,Tm)Cu2O7",
abstract = "Samples with nominal starting compositions T1Sr2(Ca1-xCrx)Cu2O 7 and T1Sr2(Sr1-xTmx)Cu2O 7 were prepared and investigated by electrical resistivity and X-ray powder diffraction methods. Most of the samples have 1212 as the major phase and 1201 as the minor phase. T1Sr2(Ca1-xCrx)Cu2O7 with x = 0 exhibited a non-superconducting metallic behaviour down to 60 K. The sample with x = 0.5 had the highest superconducting onset temperature Tc of about 105 K. The T1Sr2(Sr1-xTmx)Cu2O7 samples with x = 0.5 and 0.6 exhibited the maximum Tc of about 93 K. The optimum average Cu valence for superconductivity was estimated by assuming an ideal 1212 stoichiometry. The importance of ionic radii of the substituted elements for the formation of the 1212 phase is also discussed.",
author = "{Abd. Shukor}, Roslan and Quah, {C. T.}",
year = "1994",
doi = "10.1016/0921-5107(94)90278-X",
language = "English",
volume = "23",
pages = "54--57",
journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",
issn = "0921-5107",
publisher = "Elsevier BV",
number = "1",

}

TY - JOUR

T1 - Superconductivity of 1212-type phase T1Sr2(Ca,Cr)Cu2O7 and T1Sr2(Sr,Tm)Cu2O7

AU - Abd. Shukor, Roslan

AU - Quah, C. T.

PY - 1994

Y1 - 1994

N2 - Samples with nominal starting compositions T1Sr2(Ca1-xCrx)Cu2O 7 and T1Sr2(Sr1-xTmx)Cu2O 7 were prepared and investigated by electrical resistivity and X-ray powder diffraction methods. Most of the samples have 1212 as the major phase and 1201 as the minor phase. T1Sr2(Ca1-xCrx)Cu2O7 with x = 0 exhibited a non-superconducting metallic behaviour down to 60 K. The sample with x = 0.5 had the highest superconducting onset temperature Tc of about 105 K. The T1Sr2(Sr1-xTmx)Cu2O7 samples with x = 0.5 and 0.6 exhibited the maximum Tc of about 93 K. The optimum average Cu valence for superconductivity was estimated by assuming an ideal 1212 stoichiometry. The importance of ionic radii of the substituted elements for the formation of the 1212 phase is also discussed.

AB - Samples with nominal starting compositions T1Sr2(Ca1-xCrx)Cu2O 7 and T1Sr2(Sr1-xTmx)Cu2O 7 were prepared and investigated by electrical resistivity and X-ray powder diffraction methods. Most of the samples have 1212 as the major phase and 1201 as the minor phase. T1Sr2(Ca1-xCrx)Cu2O7 with x = 0 exhibited a non-superconducting metallic behaviour down to 60 K. The sample with x = 0.5 had the highest superconducting onset temperature Tc of about 105 K. The T1Sr2(Sr1-xTmx)Cu2O7 samples with x = 0.5 and 0.6 exhibited the maximum Tc of about 93 K. The optimum average Cu valence for superconductivity was estimated by assuming an ideal 1212 stoichiometry. The importance of ionic radii of the substituted elements for the formation of the 1212 phase is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=0028380419&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028380419&partnerID=8YFLogxK

U2 - 10.1016/0921-5107(94)90278-X

DO - 10.1016/0921-5107(94)90278-X

M3 - Article

VL - 23

SP - 54

EP - 57

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

SN - 0921-5107

IS - 1

ER -