Since the discovery of high-T<sub>c</sub> superconductors, additions of proper elements to YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> system have been proved to be qu...Since the discovery of high-T<sub>c</sub> superconductors, additions of proper elements to YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> system have been proved to be quite effective in both mechanism researches and improvements of sample preparation technique. Recently, an interesting phenomenon in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> was reported by Feng Yong et al., i.e. when being doped with appropriate amounts of V<sub>2</sub>O<sub>5</sub>, samples which have been quenched in air from 900℃ to展开更多
文摘Since the discovery of high-T<sub>c</sub> superconductors, additions of proper elements to YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> system have been proved to be quite effective in both mechanism researches and improvements of sample preparation technique. Recently, an interesting phenomenon in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> was reported by Feng Yong et al., i.e. when being doped with appropriate amounts of V<sub>2</sub>O<sub>5</sub>, samples which have been quenched in air from 900℃ to
