Novel magnesium borides and their superconductivity.

High superconducting transition temperatures of new rare earth ternary borides.

A new group of ternary borides has been found that show either ferromagnetism or superconductivity. Their general formula is MRh(4)B(4) where M is a transition or rare-earth element. Their superconducting transition temperatures range from approximately 2.5 K for the Sm compound to approximately 12 K for the Lu compound.

As-grown Growth of MgB2 Thin Films and Fabrication of Josephson Junctions

In the fall of 2001, a group of researchers at Aoyama Gakuin University published a report in Nature on a new superconducting material, MgB2 (magnesium boride), which has a critical temperature of 39 K [1], the finding of which sent shock waves around the world. The discovery of superconductivity in Hg traces back to 1911. Since then, various metals and metal compounds have been confirmed to sh...

Superconductivity of Magnesium Diboride: Theoretical Aspects

A ug 2 00 5 Electronic structure , electron - phonon coupling and superconductivity of isotypic noncentrosymmetric crystals Li 2 Pd 3 B and Li 2 Pt 3

Electronic structure of recently discovered isotypic ternary borides Li2Pd3B and Li2Pt3B, with noncentrosymmetric crystal structures, is studied with a view to understanding their superconducting properties. Estimates of the Fermi-surface averaged electron-phonon matrix element and Hopfield parameter are obtained in the rigid ion approximation of Gaspari and Gyorffy [Phys. Rev. Lett. 28 (1972) ...

Superconducting properties of carbonaceous chemical doped MgB2

The discovery of superconductivity in magnesium diboride (MgB2: 39 K, in January 2001) (Nagamatsu et al., 2001) has generated enormous interest and excitement in the superconductivity community and the world in general, but especially among researchers into superconductivity in non-oxide and boron related compounds.