Superconductivity above 120 K in HgBa2CaCu2O6+δ

S. N. Putilin, E. V. Antipov, M. Marezio

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237 Citations (Scopus)

Abstract

The second member (Hg-1212) of the recently discovered homologous series HgBa2Can-1CunO2n+2+δ has been synthesized by solid state reaction, carried out at 800°C under 60 kbar. The X-ray diffraction powder pattern of one of the samples was refined by the Rietveld analysis. The final results clearly showed that it corresponded to the structural arrangement of the Hg-1212 compound with lattice parameters a = 3.8556 (8) A ̊, c = 12.652 (4) A ̊. No major impurities were observed in the X-ray pattern. AC magnetic susceptibility measurements showed that these samples undergo a paramagnetic-to-diamagnetic transition well above 120 K. The multi-transition aspect of the susceptibility curves showed that the samples contained some intergrowth. In a few samples a transition as high as 132 K was observed which might correspond to the third member of the Hg-series.

Original languageEnglish
Pages (from-to)266-270
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume212
Issue number3-4
DOIs
Publication statusPublished - 15 Jul 1993
Externally publishedYes

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