Influence of Rb, Cs and Ba on Superconductivity of Magnesium Diboride

Abstract

Magnesium diboride has been thermally treated in the presence of Rb, Cs, and Ba. Magnetic susceptibility shows onsets of superconductivity in the resulting samples at 52K (Rb), 58K (Cs) and 45K (Ba). Room-temperature 11B NMR indicates to cubic symmetry of the electric field gradient at boron site for the samples reacted with Rb and Cs, in contrast to the axial symmetry in the initial MgB2 and in the sample treated with Ba.

arXiv comment3 pages (twocolumn), 2 figures

References in corpus (4)

• Superconductivity of metallic boron in MgB_2
• Electronic Structure, Electron-Phonon Coupling, and Multiband Effects in MgB2
• Substitution effect of Zn and Cu in MgB2 on Tc and structure
• Absence of Superconductivity in BeB2

Cited by in corpus (5)

• Thermodynamic stabilities of ternary metal borides: An ab initio guide for synthesizing layered superconductors
• First-principle solubilities of alkali and alkaline earth metals in Mg-B alloys
• Superconductivity in the metallic-oxidized magnesium interface
• Superconductivity of Mg/MgO interface formed by shock-wave pressure
• Superconductivity in Mg/MgO interface