Electrical and thermal transport properties of Nb- and Ru-substituted Mo3Al2C superconducting compounds

B. Ramachandran, J. Y. Jhiang, Y. K. Kuo, C. N. Kuo, C. S. Lue

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)


Partial substitution effects of Nb and Ru on the superconducting and normal-state properties of Mo3Al2C-based compounds, namely Mo3-xNbxAl2C (x=0.00-0.25) and Mo3-xRuxAl2C (x=0.00-0.15), were investigated by means of electrical, magnetic, and thermoelectric studies. From the resistivity and magnetization data, we noted that the superconducting transition temperature of Mo3Al2C decreases gradually with increasing the dopant content of Nb and Ru, and the superconducting volume fraction also decreases significantly upon the substitution. The electrons dominate the thermoelectric transport in the studied compounds. Moreover, a change of curvature near 50 K in the transport properties of the parent Mo3Al2C compound was observed, prior to the superconducting transition. This is most likely due to the strong electron-phonon interaction which could have originated from the distortions near the Al sites. Finally, it was found that electronic carriers contribute considerably to heat conduction of the Mo3Al2C-based compounds near room temperature, whereas the phonons dominate the low-temperature thermal transport.

期刊Superconductor Science and Technology
出版狀態Published - 2016 一月 22

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 凝聚態物理學
  • 金屬和合金
  • 電氣與電子工程
  • 材料化學


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