The elastic constants and anisotropy of superconducting MgCNi3 and CdCNi3 under different pressure

Huifang Feng, Xiaozhi Wu, Liyong Gan, Rui Wang, Qunyi Wei

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The second-order elastic constants (SOECs) and third-order elastic constants (TOECs) of MgCNi3 and CdCNi3 are presented by using first-principles methods combined with homogeneous deformation theory. The Voigt-Reuss-Hill (VRH) approximation are used to calculate the bulk modulus B, shear modulus G, averaged Young's modulus E and Poisson's ratio ν for polycrystals and these effective modulus are consistent with the experiments. The SOECs under different pressure of MgCNi3 and CdCNi3 are also obtained based on the TOECs. Furthermore, the Zener anisotropy factor, Chung-Buessem anisotropy index, and the universal anisotropy index are used to describe the anisotropy of MgCNi3 and CdCNi3. The anisotropy of Young's modulus of single-crystal under different pressure is also presented. © 2013 Springer Science+Business Media New York.
Original languageEnglish (US)
Pages (from-to)1187-1194
Number of pages8
JournalJournal of Superconductivity and Novel Magnetism
Volume27
Issue number5
DOIs
StatePublished - Nov 23 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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