Temperature dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi 3

We report the structural parameters of superconducting MgC x Ni 3 ( x=0.96, T c=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 Pm 3 ̄ m and a=...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 363; no. 4; pp. 215 - 218
Main Authors Huang, Q., He, T., Regan, K.A., Rogado, N., Hayward, M., Haas, M.K., Inumaru, K., Cava, R.J.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2001
Subjects
Neutron powder diffraction
No-oxide perovskite
Structure parameters
74.25.-q
Structure parameters
61.12.-q
No-oxide perovskite
Neutron powder diffraction
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Summary:We report the structural parameters of superconducting MgC x Ni 3 ( x=0.96, T c=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 Pm 3 ̄ m 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 T c.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(01)01068-1