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Journal of Superconductivity and Novel Magnetism

, Volume 31, Issue 8, pp 2355–2361 | Cite as

The Ideal Strengths of Superconducting MgCNi3 and CdCNi3

  • Xianshi Zeng
  • Huijun Wan
  • Siling Guo
  • Qingdong Gou
  • Donglan Wu
  • Yufeng Wen
  • Lili Liu
Original Paper
  • 93 Downloads

Abstract

The stress-strain curves under tensile deformation in the 〈100〉, 〈110〉, and 〈111〉 directions and under shear deformation in the (001)〈110〉, \((110)\langle \overline {1}10\rangle \), \((111)\langle 1\overline {1}0\rangle \), and \((111)\langle 11\overline {2}\rangle \) slip systems have been systematically calculated by first-principles method to study the ideal strengths of superconducting MgCNi3 and CdCNi3. The ideal strengths in the three tensile directions are found to be reduced in the order of 〈100〉 → 〈110〉 → 〈111〉 and those for the four shear slip systems in the order of \((110)\langle \overline {1}10\rangle \rightarrow (111)\langle 11\overline {2}\rangle \rightarrow (111)\langle 1\overline {1}0\rangle \rightarrow (001)\langle 110\rangle \) for both superconductors. Their lowest ideal tensile strengths are found to be larger than the corresponding highest ideal shear strengths, which could explain why both superconductors have the ductility. The obtained lattice constants and elastic properties coincide well with the the available experimental and theoretical values.

Keywords

MgCNi3 CdCNi3 Ideal strength First-principles 

Notes

Acknowledgements

The work is supported by the Natural Science Foundation of China (51661013, 11564019, 11464020), the PhD Start-up Fund of Natural Science Foundation of Jinggangshan University(JZB15007), and the Science and Technology Research Program of Chongqing Municipal Education Commission (KJ1710252).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  • Xianshi Zeng
    • 1
    • 4
  • Huijun Wan
    • 1
  • Siling Guo
    • 1
  • Qingdong Gou
    • 1
  • Donglan Wu
    • 1
  • Yufeng Wen
    • 1
    • 2
    • 3
  • Lili Liu
    • 5
  1. 1.Institute of Atomic, Molecular Physics and Functional MaterialsJinggangshan UniversityJi’anPeople’s Republic of China
  2. 2.Department of Applied PhysicsJinggangshan UniversityJi’anPeople’s Republic of China
  3. 3.School of Materials Science and EngineeringShanghai Jiaotong UniversityShanghaiPeople’s Republic of China
  4. 4.Research Center of Laser FusionChina Academy of Engineering PhysicsMianyangPeople’s Republic of China
  5. 5.Department of PhysicsChongqing Three Gorges UniversityWanzhouPeople’s Republic of China

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