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Title: | Intralayer Carbon Substitution in the MgB_2 Superconductor |
Authors: | Takenobu, T. Ito, T. H. Chi, Dam Prassides, K. Iwasa, Y. |
Issue Date: | 2001-09-11 |
Publisher: | American Physical Society |
Magazine name: | Physical Review B |
Volume: | 64 |
Number: | 13 |
Start page: | 134513-1 |
End page: | 134513-3 |
DOI: | 10.1103/PhysRevB.64.134513 |
Abstract: | We report that the ternary MgB_<2-x>C_x compounds adopt an isostructural AlB_2-type hexagonal structure in a relatively small range of nominal carbon concentration, x<0.1. The lattice parameter a decreases almost linearly with increasing carbon content x, while the c parameter remains unchanged, indicating that carbon is exclusively substituted in the boron honeycomb layer without affecting the interlayer interactions. The superconducting transition temperature T_c decreases quasilinearly as a function of the carbon concentration, with a slope steeper than that for the isoelectronic Mg_<1-x>Al_xB_2. |
Rights: | T. Takenobu, T. Ito, Dam Hieu Chi, K. Prassides and Y. Iwasa., Physical Review B, 64(13), 2001, 134513-1-134513-3. Copyright 2001 by the American Physical Society. http://link.aps.org/abstract/PRB/v64/e134513 |
URI: | http://hdl.handle.net/10119/4618 |
Material Type: | publisher |
Appears in Collections: | a10-1. 雑誌掲載論文 (Journal Articles)
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