| Autor: |
Yang, Wuzhang, Xiao, Guorui, Zhu, Qinqing, Song, Shijie, Cao, Guang‐Han, Ren, Zhi |
| Předmět: |
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| Zdroj: |
Journal of the American Ceramic Society; Jul2023, Vol. 106 Issue 7, p4211-4219, 9p, 1 Color Photograph, 2 Black and White Photographs, 4 Graphs |
| Abstrakt: |
We report the effect of carbon doping in Ti‐stabilized nonstoichiometric molybdenum diboride (Mo0.96Ti0.04)0.8${(\text{Mo}_{0.96}\text{Ti}_{0.04})}_{0.8}$B2, which exhibits bulk superconductivity below Tc = 7.0 K. It is found that (Mo0.96Ti0.04)0.8${(\text{Mo}_{0.96}\text{Ti}_{0.04})}_{0.8}$(B1−xCx)2${(\text{B}_{1-x}\text{C}_{x})}_{2}$ maintains the AlB2‐type phase with a uniform elemental distribution for x = 0.12 and 0.16. The substitution of carbon for boron leads to a slight increase in a‐axis, a remarkable reduction in c‐axis, the formation of planar defects along the (100) crystallographic planes, and a shift of the B 1s peaks toward higher binding energies. Contrary to (Mo0.96Ti0.04)0.8${(\text{Mo}_{0.96}\text{Ti}_{0.04})}_{0.8}$B2, however, no superconductivity is observed down to 1.8 K for the C‐doped samples, which is ascribed to the electron filling of boron π bands resulting from the carbon doping. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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