Superconducting properties of the mercury and Cu/C phases

J. L. Tholence, P. Toulemonde, A. Sulpice, C. Acha, M. Nunez-Regueiro, J. J. Capponi, C. Chaillout, M. Alario-Franco, E. Gautier, S. Le Floch, M. Marezio, P. Bordet, S. M. Loureiro, S. N. Putilin, E. V. Antipov

Research output: Contribution to journalArticlepeer-review


In HgBa2Can-1CunO8+δ, Tc reaches 135K for n=3 in HgBa2Can-1CunO8+δ. Tc goes through a maximum versus the oxygen content for n=1,2,3 and increases with pressure for 1<n<5. The critical current densities, irreversibility line and anisotropy compare favorably with other (Bi, Tl,...) compounds. Many substitutions have been tried, which, however, did not allow to reach Tc's larger than 140K, up to now. In the CyCu1-yBa2Can-1CunO x cuprates, the n=3 phase has a Tc of 120K after annealing in Ar, the as prepared n=4 phase is very stable with an optimal Tc of 117K and a phase with Tc ≈ 126.5K (the highest Tc without toxic element) has been observed. Most of the obtained phases have also been studied under pressure.

Original languageEnglish
Pages (from-to)857-858
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Issue numberPART 2
Publication statusPublished - Aug 1997
Externally publishedYes


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