2001/10/29 by T. G. Amos, Tammy G. Amos, Q. Huang +3 · 3 citations
Chemistry · Materials Science · Physics and Astronomy · #Analytical Chemistry (journal) #Atmospheric temperature range #Carbon fibers #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Diffraction #Magnetic and transport properties of perovskites and related materials #Materials science #Neutron diffraction #Organic chemistry #Perovskite (structure) #Phase (matter) #Phase transition #Physical chemistry #Physics #Powder diffraction #Rare-earth and actinide compounds #Stoichiometry #Superconductivity #Thermal Expansion and Ionic Conductivity #Thermodynamics #Transition temperature #cond-mat.supr-con
paper · pdf · doi:10.1016/s0038-1098(01)00470-7
4 figures
arxiv created 2001/10/29 · openalex publication_date 2002/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The crystal structure of the superconductor MgCxNi3 is reported as a function of carbon concentration determined by powder neutron diffraction. The single-phase perovskite structure was found in only a narrow range of carbon content, 0.88 < x < 1.0. The superconducting transition temperature was found to decrease systematically with decreasing carbon concentration. The introduction of carbon vacancies has a significant effect on the positions of the Ni atoms. No evidence for long range magnetic ordering was seen by neutron diffraction for carbon stoichiometries within the perovskite phase stability range.