Pressure effects on the transition temperature of superconducting MgCxNi3

D. Yang, S. Mollah, L. Huang, L. Ho, C. J. Liu, J. Y. Lin, Y. L. Zhang, R. C. Yu, C. Q. Jin

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

The effect of hydrostatic pressure (P) up to 17 kbar on the superconducting transition temperature (TC) of the newly discovered intermetallic nonoxide perovskite superconductor MgCxNi3 has been reported. TC is found to increase with increasing P at a rate of dTC/dP∼0.0134 to 0.0155 K/kbar depending on the value of carbon content x. The absolute value of dTC/dP for MgCxNi3 is about the same as that of intermetallic RNi2B2C (R denotes rare earth) and metallic superconductors but about one order of magnitude smaller than that of the most recently and intensively studied superconductor MgB2. However, the d ln TC/dP∼0.001 81 to 0.002 24 kbar-1 and the rate of change of TC with unit cell volume (V), d ln TC/d ln V∼-3.18 to-2.58 of MgCxNi3 are having the comparable magnitude to that of MgB2 with opposite sign. The increase of TC with P in MgCxNi3 can be explained in the framework of density of states (DOS) effect.

原文English
期刊Physical Review B - Condensed Matter and Materials Physics
68
發行號9
DOIs
出版狀態Published - 2003

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

指紋

深入研究「Pressure effects on the transition temperature of superconducting MgC<sub>x</sub>Ni<sub>3</sub>」主題。共同形成了獨特的指紋。

引用此