Electronic Property of the C-Site Doped MgCNi

C-site doped MgCNi 3 compounds, MgC 1− x B x Ni 3 ( x =0.15, 0.20) and MgC y Ni 3 ( y =1.00, 0.80, 0.65), have been investigated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The binding energies of Ni 2p3/2 and C 1s for undoped MgCNi 3 are 853.173 eV and 283.640 eV, respect...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2014, Vol.27 (1), p.209-213
Main Authors: Chu, Songnan, Shi, Lei, Wu, Weitai, Wang, Yang, Gou, Gaoyang
Format: Article
Language:English
Subjects:
Binding energy
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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Summary:C-site doped MgCNi 3 compounds, MgC 1− x B x Ni 3 ( x =0.15, 0.20) and MgC y Ni 3 ( y =1.00, 0.80, 0.65), have been investigated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The binding energies of Ni 2p3/2 and C 1s for undoped MgCNi 3 are 853.173 eV and 283.640 eV, respectively. Interestingly, the binding energy of Ni 2p3/2 is found to shift to a lower value with decreasing C-site occupation in MgC y Ni 3 samples. The C-site doped by boron could also lead to a slight decrease of the binding energy of Ni 2p3/2. However, the C-site doping has few effects on the binding energy of C 1s. It is suggested that there is charge transfer from Ni- to C-site atom. The hybridism between Ni and C has an important effect on the superconductivity of MgCNi 3 .
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-013-2242-0