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

Journal article

We report the structural parameters of superconducting MgCxNi3 (x=0.96, Tc=7.3 K) as a function of temperature, from 2 to 295 K, determined by neutron powder diffraction profile refinement. The compound has the perovskite structure over the whole temperature range, with symmetry Pm3̄m and a=3.81221(5) Å 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. © 2001 Elsevier Science B.V. All rights reserved.

Authors: Huang, Q; He, T; Regan, K; Rogado, N; Hayward, M

• Publication status: Published
• Journal: PHYSICA C
• Volume: 363
• Issue: 4
• Pages: 215-218
• Publication date: 2001-12-01
• DOI: 10.1016/S0921-4534(01)01068-1
• ISSN: 0921-4534
• Language: English
• Keywords: neutron powder diffraction; no-oxide perovskite; structure parameters