Carbon concentration dependence of the superconducting transition temperature and structure of MgCxNi3 |
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| Institution: | 1. NIST Center for Neutron Research, Gaithersburg, MD 20899, USA;2. Department of Materials and Nuclear Engineering, University of Maryland, College Park, MD 20742, USA;3. Department of Chemistry and Princeton Materials Institute, Princeton University, Princeton, NJ 08544, USA;1. Key Laboratory of Computational Geodynamics, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China;2. School of Earth and Space Science, Peking University, Beijing, 100871, China;3. Pacific Geoscience Centre, Geological Survey of Canada, Natural Resources Canada, 9860 West Saanich Road, Sidney, British Columbia, V8L 4B2, Canada;4. School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, V8P 5C2, Canada;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 210009, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing Tech University, Nanjing, 210009, China;1. School of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou 466001, China;2. Zhoukou Key Laboratory of Environmental Pollution Control and Remediation, Zhoukou Normal University, Zhoukou 466001, China;3. Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;4. College of Environment and Resources, University of Chinese Academy of Sciences, Beijing 100049, China;5. Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, Graz 8010, Austria;6. School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton SO17 1 BJ, United Kingdom;1. College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, People’s Republic of China;2. Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, People’s Republic of China;1. Department of Materials Science and Engineering, Khulna University of Engineering & Technology, Khulna, 9203, Bangladesh;2. Department of Electronics and Communication Engineering, Khulna University of Engineering & Technology, Khulna, 9203, Bangladesh;3. Cenrtal Engineering Facilities, Atomic Energy Research Establishment, Savar, Dhaka, 1349, Bangladesh;4. Former Faculty, Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna, 9203, Bangladesh;1. Department of Neurology, The Affiliated Hospital of Qingdao University, China;2. Department of Neurology, Hospital of Integrated Traditional and Western Medicine, China;3. Department of Rehabilitation, The Affiliated Hospital of Qingdao University, China |
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| Abstract: | 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. |
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