Superconductivity above 130 K in the Hg-Ba-Ca-Cu-O system

Details Superconductivity above 130 K in the Hg-Ba-Ca-Cu-O system Superconductivity above 130 K in the Hg-Ba-Ca-Cu-O system

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.363...56s&link_type=abstract

Nature (ISSN 0028-0836), vol. 363, no. 6424, p. 56-58.

Physics

Condensed Matter

Superconductivity

615

Copper Oxides, Crystal Structure, High Temperature Superconductors, Mercury Oxides, Superconductivity, Transition Temperature, Barium Oxides, Calcium Oxides, Fabrication, Magnetic Permeability, Thulium Compounds

Scientific paper

The discovery of superconductivity above 130 K in a layered material containing Hg-Ba-Ca-Cu-O compounds is reported. Several methods were used to study the microstructure of this material. The material demonstrated an ordered superstructure composed of a defined sequence of unit cells of the two phases observed. Magnetic and resistivity measurements confirm a maximum transition temperature of about 133 K, higher than previously recorded values for similar compounds containing thallium and bismuth. It is suggested that Hg-1223 is responsible for superconductivity at this temperature.

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