| 摘要 |
The disclosed substance has a general chemical formula of La2-Cu1-Oz, z being 3.84 to 4.00. The disclosed substance shows, at a temperature below 20 DEG K., superconductivity, either potential or real, and the substance also shows, at a temperature below 30 DEG K., superconductive photoconductivity in response to incident exciting light in a wavelength range of 420 to 640 nm. The substance is produced by heating a mixture of starting material therefor at 900 DEG -1,050 DEG C. for 5-10 hours to cause solid state reaction, cooling gradually, shaping under pressure, re-sintering at 700 DEG -1,200 DEG C., and cooling either quickly at a rate of 2,000 DEG -900 DEG C./sec or slowly at a rate of 150 DEG -200 DEG C./hour.
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