Abstract
The solid solutions BaAl1-xSi1+x (0 ≤ x ≤ 0.5) were prepared. The compound with the stoichiometric composition (x = 0) did not show superconductivity as reported by other investigators, but the solid solutions with x > 0 became superconductors with a transition temperature Tc = 2.8 K. The comparison of the lattice parameters with those of the other isotypic ternary superconductors MAlSi (M = Ca, Sr) suggested that the superconductivity could be related to the lattice parameter within the (AlSi) plane rather than the interlayer spacing. The band structures near the Fermi level of MAlSi (M = Ca, Sr, Ba) were measured using soft X-ray photoelectron spectroscopy, which were in good agreement with the calculated ones, confirming that the contribution of the d orbitals of the alkaline-earth metals were predominant in the conduction bands.
Original language | English |
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Pages (from-to) | 19-23 |
Number of pages | 5 |
Journal | Physica C: Superconductivity and its applications |
Volume | 451 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2007 Jan 1 |
Keywords
- AlB type structure
- BaAlSi
- CaAlSi
- SrAlSi
- Superconductivity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering