SUPERCONDUCTORS BEYOND 1-2-3

被引：7

作者：

CAVA, RJ

机构：

来源：

SCIENTIFIC AMERICAN | 1990年 / 263卷 / 02期

关键词：

D O I：

10.1038/scientificamerican0890-42

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In the past four years researchers have developed a dozen ceramics whose electric resistance vanishes at temperatures as high as 125 kelvins. In all the best superconductors, planes of copper and oxygen atoms compete against layers of other elements for electrons. Chemists have now learned to stack the odds against one of the competitors to achieve higher transition temperatures.; Yttrium1-barium2-copper3 oxide is only one of many new high-temperature superconductors. All have planes of copper and oxygen atoms, providing the perfect highways for electrons. The article reviews various other ceramic materials containing copper oxides that have been investigated for their superconducting behavior. Among them thallium barium calcium copper oxide exhibits the highest transition temperature, 125 kelvins, discovered thus far. Physical aspects of superconductivity are also explained.

引用

页码：42 / 49

页数：8