Superconductivity of TlSr1212 derivatives with Mo and in substitutions at Sr-site

B. Musa, A. K. Yahya, Mohammad Hafizuddin Jumali

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Derivatives of TlSr1212 type phase with nominal starting compositions of Tl0.9Bi0.1Sr2-xMoxCa 0.9Y0.1Cu2O7(x = 0.0 - 0.4) and Tl0.9Bi0.1Sr2-yInyCaCu 2O7(y = 0.0 - 0.5) were prepared and investigated by d.c. electrical resistance measurements, powder X-ray diffraction (XRD) and scanning electron microscope (SEM). Partial substitution of Mo for Sr initially increased Tc zero and 1212 phase formation at x = 0.1 but both gradually deteriorated with increasing Mo. Partial substitution of In for Sr suppressed Tc zero but maintained 1212 volume fraction between 69-73 %. Our results showed strong influence of the substitutions on the temperature dependence of the normal state resistance as well as Tc values and indicate that the substitutions successfully modified the number of charge carriers in the superconducting planes. Effects of the elemental substitutions on superconductivity of TlSr1212 are discussed in terms of ionic radius of dopants and the concept of average Cu valence.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages186-192
Number of pages7
Volume909
DOIs
Publication statusPublished - 2007
EventSOLID STATE SCIENCE AND TECHNOLOGY: 2nd International Conference on Solid State Science and Technology 2006, ICSSST 2006 - Kuala Terengganu
Duration: 4 Sep 20066 Sep 2006

Other

OtherSOLID STATE SCIENCE AND TECHNOLOGY: 2nd International Conference on Solid State Science and Technology 2006, ICSSST 2006
CityKuala Terengganu
Period4/9/066/9/06

Fingerprint

superconductivity
substitutes
electrical resistance
charge carriers
electron microscopes
valence
temperature dependence
radii
scanning
diffraction
x rays

Keywords

  • Cu valence
  • Sr-site
  • Substitution
  • TlSrl212

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Superconductivity of TlSr1212 derivatives with Mo and in substitutions at Sr-site. / Musa, B.; Yahya, A. K.; Jumali, Mohammad Hafizuddin.

AIP Conference Proceedings. Vol. 909 2007. p. 186-192.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Musa, B, Yahya, AK & Jumali, MH 2007, Superconductivity of TlSr1212 derivatives with Mo and in substitutions at Sr-site. in AIP Conference Proceedings. vol. 909, pp. 186-192, SOLID STATE SCIENCE AND TECHNOLOGY: 2nd International Conference on Solid State Science and Technology 2006, ICSSST 2006, Kuala Terengganu, 4/9/06. https://doi.org/10.1063/1.2739850
Musa, B. ; Yahya, A. K. ; Jumali, Mohammad Hafizuddin. / Superconductivity of TlSr1212 derivatives with Mo and in substitutions at Sr-site. AIP Conference Proceedings. Vol. 909 2007. pp. 186-192
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N2 - Derivatives of TlSr1212 type phase with nominal starting compositions of Tl0.9Bi0.1Sr2-xMoxCa 0.9Y0.1Cu2O7(x = 0.0 - 0.4) and Tl0.9Bi0.1Sr2-yInyCaCu 2O7(y = 0.0 - 0.5) were prepared and investigated by d.c. electrical resistance measurements, powder X-ray diffraction (XRD) and scanning electron microscope (SEM). Partial substitution of Mo for Sr initially increased Tc zero and 1212 phase formation at x = 0.1 but both gradually deteriorated with increasing Mo. Partial substitution of In for Sr suppressed Tc zero but maintained 1212 volume fraction between 69-73 %. Our results showed strong influence of the substitutions on the temperature dependence of the normal state resistance as well as Tc values and indicate that the substitutions successfully modified the number of charge carriers in the superconducting planes. Effects of the elemental substitutions on superconductivity of TlSr1212 are discussed in terms of ionic radius of dopants and the concept of average Cu valence.

AB - Derivatives of TlSr1212 type phase with nominal starting compositions of Tl0.9Bi0.1Sr2-xMoxCa 0.9Y0.1Cu2O7(x = 0.0 - 0.4) and Tl0.9Bi0.1Sr2-yInyCaCu 2O7(y = 0.0 - 0.5) were prepared and investigated by d.c. electrical resistance measurements, powder X-ray diffraction (XRD) and scanning electron microscope (SEM). Partial substitution of Mo for Sr initially increased Tc zero and 1212 phase formation at x = 0.1 but both gradually deteriorated with increasing Mo. Partial substitution of In for Sr suppressed Tc zero but maintained 1212 volume fraction between 69-73 %. Our results showed strong influence of the substitutions on the temperature dependence of the normal state resistance as well as Tc values and indicate that the substitutions successfully modified the number of charge carriers in the superconducting planes. Effects of the elemental substitutions on superconductivity of TlSr1212 are discussed in terms of ionic radius of dopants and the concept of average Cu valence.

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