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Elemental Substitution at Tl Site of Tl1−xXx(Ba, Sr)CaCu2O7 Superconductor with X = Cr, Bi, Pb, Se, and Te

Nur-Akasyah, Jaafar ; Abd-Shukor, Roslan ; Chong, Tet Vui

Materials, 2023-05, Vol.16 (11), p.4022 [Periódico revisado por pares]

Basel: MDPI AG

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  • Título:
    Elemental Substitution at Tl Site of Tl1−xXx(Ba, Sr)CaCu2O7 Superconductor with X = Cr, Bi, Pb, Se, and Te
  • Autor: Nur-Akasyah, Jaafar ; Abd-Shukor, Roslan ; Chong, Tet Vui
  • Assuntos: Barium ; Bismuth ; Chromium ; Electron microscopes ; Grain size ; Lead ; Magnetic fields ; Materials substitution ; Selenium ; Software ; Strontium ; Substitution reactions ; Superconductivity ; Tellurium ; Tl(Ba,Sr)CaCu2O7 ; Tl-1212 ; Transition metals ; Transition temperature
  • É parte de: Materials, 2023-05, Vol.16 (11), p.4022
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: The effects of elemental substitutions at the Tl site of a Tl1−xXx(Ba, Sr)CaCu2O7 superconductor with X = Cr, Bi, Pb, Se, and Te were investigated. This study aimed to determine the elements that enhance and suppress the superconducting transition temperature of the Tl1−xXx(Ba, Sr)CaCu2O7 (Tl-1212) phase. The selected elements belong to the groups of transition metal, post-transition metal, non-metal, and metalloid. The relationship between the transition temperature and ionic radius of the elements was also discussed. The samples were prepared by the solid-state reaction method. The XRD patterns showed a single Tl-1212 phase was formed in the non- and Cr-substituted (x = 0.15) samples. The Cr-substituted samples (x = 0.4) showed a plate-like structure with smaller voids. The highest superconducting transition temperatures (Tc onset, Tcχ′, and Tp) were also achieved by the Cr-substituted samples for x = 0.4 compositions. However, the substitution of Te suppressed the superconductivity of the Tl-1212 phase. Jc inter (Tp) for all samples was calculated to be in the range of 12–17 A/cm2. This work shows that substitution elements with a smaller ionic radius tend to be more favorable in improving the superconducting properties of the Tl-1212 phase.
  • Editor: Basel: MDPI AG
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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