AC susceptibility and electrical properties of rare-earth- and alkali metal-substituted (Tl0.7M0.3)Sr2CaCu2O7 with M = Er, Gd, La, Na, K and Rb

Ilhamsyah Putra Abu Bakar, K. Muhammad-Aizat, J. Nur-Akasyah, M. S. Mohd-Syahmi, Nurul Raihan Mohd Suib, W. S. Chiu, Roslan Abd. Shukor

Research output: Contribution to journalArticle

Abstract

The effects of rare-earth elements M = Er, Gd and La, and alkali metals M = Na, K and Rb substitution on (Tl0.7M0.3)Sr2CaCu2O7 (Tl-1212) are reported. The rare-earth elements were chosen by considering the ionic radius, i.e., from the smallest (Er+3) to the largest (La+3) ion. The samples were prepared via the solid-state reaction method. X-ray diffraction patterns showed the presence of major Tl-1212 and minor Tl-1201 and Ca0.3Sr0.7CuO2 phase in almost all samples. The resistance versus temperature curves for the rare-earth-substituted samples showed onset temperature between 87 and 90 K and zero resistance temperature between 69 and 81 K. Alkali metal substitutions exhibited Tl-1212 phase but showed no superconducting transition although the electrical resistivity was much lower than the rare-earth-substituted samples. AC susceptibility measurement showed superconducting transition T, between 59 and 80 K for the rare-earth element-substituted samples. The average grain size, the transition temperature, T and the peak temperature Tp of the imaginary part of the susceptibility χ″ decreased as the ionic radius of the rare earths was reduced.

LanguageEnglish
Article number21
JournalApplied Physics A: Materials Science and Processing
Volume125
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

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Ionic conduction in solids
Strontium compounds
Rare Earth Metals
Calcium Compounds
Calcium compounds
Copper compounds
Alkali Metals
Alkali metals
Rare earth elements
Solid state reactions
Magnetic susceptibility
Rare earths
Superconducting transition temperature
Electric properties
Substitution reactions
Temperature
Diffraction patterns
Ions
X ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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AC susceptibility and electrical properties of rare-earth- and alkali metal-substituted (Tl0.7M0.3)Sr2CaCu2O7 with M = Er, Gd, La, Na, K and Rb. / Bakar, Ilhamsyah Putra Abu; Muhammad-Aizat, K.; Nur-Akasyah, J.; Mohd-Syahmi, M. S.; Mohd Suib, Nurul Raihan; Chiu, W. S.; Abd. Shukor, Roslan.

In: Applied Physics A: Materials Science and Processing, Vol. 125, No. 1, 21, 01.01.2019.

Research output: Contribution to journalArticle

Bakar, Ilhamsyah Putra Abu ; Muhammad-Aizat, K. ; Nur-Akasyah, J. ; Mohd-Syahmi, M. S. ; Mohd Suib, Nurul Raihan ; Chiu, W. S. ; Abd. Shukor, Roslan. / AC susceptibility and electrical properties of rare-earth- and alkali metal-substituted (Tl0.7M0.3)Sr2CaCu2O7 with M = Er, Gd, La, Na, K and Rb. In: Applied Physics A: Materials Science and Processing. 2019 ; Vol. 125, No. 1.
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abstract = "The effects of rare-earth elements M = Er, Gd and La, and alkali metals M = Na, K and Rb substitution on (Tl0.7M0.3)Sr2CaCu2O7 (Tl-1212) are reported. The rare-earth elements were chosen by considering the ionic radius, i.e., from the smallest (Er+3) to the largest (La+3) ion. The samples were prepared via the solid-state reaction method. X-ray diffraction patterns showed the presence of major Tl-1212 and minor Tl-1201 and Ca0.3Sr0.7CuO2 phase in almost all samples. The resistance versus temperature curves for the rare-earth-substituted samples showed onset temperature between 87 and 90 K and zero resistance temperature between 69 and 81 K. Alkali metal substitutions exhibited Tl-1212 phase but showed no superconducting transition although the electrical resistivity was much lower than the rare-earth-substituted samples. AC susceptibility measurement showed superconducting transition Tcχ, between 59 and 80 K for the rare-earth element-substituted samples. The average grain size, the transition temperature, Tcχ and the peak temperature Tp of the imaginary part of the susceptibility χ″ decreased as the ionic radius of the rare earths was reduced.",
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