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

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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 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.

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

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Rare Earth Metals
Alkali Metals
Alkali metals
Rare earths
Electric properties
Rare earth elements
Substitution reactions
Temperature
Solid state reactions
Diffraction patterns
Superconducting transition temperature
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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