Temperature dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi3

Abstract

We report the structural parameters of superconducting MgCxNi3 (x=0.96, TC=7.3 K) as a function of temperature, from 2 K to 295 K, determined by neutron powder diffraction profile refinement. The compound has the perovskite structure over the whole temperature range, with symmetry Pm3m and a=3.81221(5) A at 295 K: no structural or long range magnetic ordering transitions were observed. The lattice parameter a and the Debye-Waller factors for the individual atoms decrease smoothly with decreasing temperature. There are no unusual changes of the structural parameters near TC.

Cited by in corpus (7)

• Evidence for strong electron-phonon coupling in MgCNi_3
• Phonon spectrum and soft-mode behavior of MgCNi_3
• Thermopower and thermal conductivity of superconducting perovskite $MgCN{i}_3$
• Structural Behavior of Non-Oxide Perovskite Superconductor MgCNi${}_3$ at Pressures up to 32 GPa
• The effect of {11}^B substitution on the superconductivity in MgCNi3
• The mechanical relaxation study of polycrystalline MgCNi3
• Effect of Mg and C contents in MgCNi3, and structure and superconductivity of MgCNi3-xCox