Calculated Changes in the Elastic Properties of MgCNi3 at the Superconducting Transition. (16th January 2013)

• Record Type: Journal Article
• Authors: Abd-Shukor, R.
• Other Names: Blamire Mark Academic Editor.
• Is Part Of: Advances in materials science and engineering. Volume 2013(2013)
• Publication Date: 2013-01-16
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2013/247393
• Languages: English
• ISSNs: 1687-8434

Abstract

Abstract : We calculated the elastic properties of MgCNi3 at the superconducting transition (T c ) using various thermodynamic and acoustic data. From the calculations, a step discontinuity of 8 ppm in the bulk modulus, 7 ppm in the Young's modulus, and 3 ppm in the longitudinal sound velocity (v l ) is expected at T c . The step discontinuities at the transition temperature indicated the importance of lattice changes to the superconducting mechanism of MgCNi3 . The Debye temperature was calculated to be 460 K. The electron-phonon coupling constants calculated in the weak and strong coupling limits of the BCS theory and the van Hove scenario showed that MgCNi3 is a moderately strong coupled superconductor.