G. A. Dubitskiy, V. D. Blank, S. G. Buga, E. E. Semenova, V. A. Kul'bachinskii, A. V. Krechetov, V. G. Kytin, “Superhard superconducting materials based on diamond and cubic boron nitride”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2005, Volume 81, Issue 6,Pages <nobr>323

This article is cited in 23 papers

CONDENSED MATTER

Superhard superconducting materials based on diamond and cubic boron nitride

G. A. Dubitskiy^a, V. D. Blank^a, S. G. Buga^a, E. E. Semenova^a, V. A. Kul'bachinskii^b, A. V. Krechetov^b, V. G. Kytin^b

^a Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow reg.
^b M. V. Lomonosov Moscow State University, Faculty of Physics

Abstract: Superhard superconducting samples with a critical temperature of $T_c=12.6\,$K are obtained when synthetic diamond powders that were preliminarily coated with a niobium film are sintered at a pressure of 7.7 GPa and a temperature of 1973 K. Superhard superconductors with $T_c=9.3\,$K are obtained when diamond and molybdenum powders are sintered at a pressure of 7.7 GPa and a temperature of 2173 K. Superconducting samples with $T_c=36.1\div 37.5\,$K have been obtained in the systems diamond–MgB$_2$ and cubic boron nitride–MgB$_2$.

PACS: \vspace*{-1mm}62.20.-x, 74.25.-q

Received: 11.02.2005