Superconducting Properties of Atomic-Disordered Compound MgCNi_3

A. Karkin; B. Goshchitskii; E. Kurmaev; Z. A. Ren; G. C. Che

Superconducting Properties of Atomic-Disordered Compound MgCNi_3

Superconductivity 2007-05-23 v1

Authors: A. Karkin , B. Goshchitskii , E. Kurmaev , Z. A. Ren , G. C. Che

Abstract

The effect of radiation-induced disordering in a nuclear reactor (fast neutrons fluence \Phi = 5\cdot10^{19} cm^2, T_{\text{irr}} = 340 K) on resistivity \rho, superconducting transition temperature T_C and upper critical field H_{C_2} of polycrystalline MgCNi_3 samples was investigated. It was found that T_C decreases under irradiation from 6.5 to 2.9 K and completely recovers after annealing at 600 ^\circC. Temperature dependences \rho(T) are characteristic of compounds with strong electron-phonon interaction. The dH_{C_2}/dT behaviour testifies to a considerable decrease in density of electronic state at Fermi level N(E_F) in the course of disordering.

Keywords

superconductivity radiation-induced disorder MgCNi_3 critical temperature upper critical field electron-phonon interaction

Cite

@article{arxiv.cond-mat/0209575,
  title  = {Superconducting Properties of Atomic-Disordered Compound MgCNi_3},
  author = {A. Karkin and B. Goshchitskii and E. Kurmaev and Z. A. Ren and G. C. Che},
  journal= {arXiv preprint arXiv:cond-mat/0209575},
  year   = {2007}
}

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4 pages, latex, 4 figures

Superconducting Properties of Atomic-Disordered Compound MgCNi_3

Abstract

Keywords

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