Electrical and thermal transport properties of EuBa2(Cu 1-xMnx)3O7-δ

Ashok Rao, Anirban Das, Tirthankar Chakraborty, Bhasker Gahtori, S. K. Agarwal, Chandan Kumar Sarkar, K. M. Sivakumar, K. K. Wu, Y. K. Kuo

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Abstract

In this communication, we present the measurements of electrical resistivity (ρ), thermal conductivity (κ), thermopower (S), and specific heat (CP) on Mn doped compounds EuBa2(Cu 1-xMnx)3O7-δ for 0≤x≤0.02. The transition temperature TC and the upper critical field HC2(0) in this series of compounds are found to decrease quasi-linearly as the Mn concentration increases. All the currently investigated samples show a hump in thermal conductivity below their transition temperatures. Thermopower measurements exhibit an electron-like behaviour for pure samples; however, a hole-like behaviour is seen in all the doped samples. A small jump in specific heat is observed in the pure samples. It is seen that replacing 0.5% Cu by Mn has little effect on the transition temperature, but there is a nearly twofold suppression in the CP jump for this sample. These results demonstrate that the impurities are being incorporated as a whole and not as a cluster.

Original languageEnglish
Article number485212
JournalJournal of Physics Condensed Matter
Volume20
Issue number48
DOIs
Publication statusPublished - 03-12-2008

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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    Rao, A., Das, A., Chakraborty, T., Gahtori, B., Agarwal, S. K., Sarkar, C. K., Sivakumar, K. M., Wu, K. K., & Kuo, Y. K. (2008). Electrical and thermal transport properties of EuBa2(Cu 1-xMnx)3O7-δ. Journal of Physics Condensed Matter, 20(48), [485212]. https://doi.org/10.1088/0953-8984/20/48/485212