Issue |
EPL
Volume 97, Number 1, February 2012
|
|
---|---|---|
Article Number | 17013 | |
Number of page(s) | 5 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/97/17013 | |
Published online | 04 January 2012 |
Effects of ordered structure on superconductivity in Ti70−xZr30Nbx (15≤ x ≤ 60)
1
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing 100190, PRC
2
School of Materials Science and Engineering, Beihang University - Beijing 100191, PRC
Received:
17
September
2011
Accepted:
25
November
2011
Superconductivity and structural properties of Ti70−xZr30Nbx have been systematically investigated for x ranging from 0 to 60. Superconductivity is observed in the cubic β-phase with 10≤x≤ 60. Moreover, evident modifications in superconductivity and superstructure, being interpreted as Nb and Ti local orders, are discovered in samples with 25≤x≤ 50. This superstructure phase in general coexists with the cubic β-phase and yields two superconducting transitions in the superconducting materials. Electronic structure calculations reveal a relatively higher density of states for the superstructure phase at the Fermi level, therefore a strong electron-phonon coupling and higher superconducting Tc are expected in agreement with the experimental data.
PACS: 74.62.Bf – Effects of material synthesis, crystal structure, and chemical composition / 74.20.Pq – Electronic structure calculations / 61.05.J- – Electron diffraction and scattering
© EPLA, 2012
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