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PAT study on stress-field pinning in high-Tc superconductors
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作者 李阳 王耘波 +5 位作者 唐春光 马庆珠 曹国辉 魏龙 王文华 张天保 《Science China Mathematics》 SCIE 1997年第9期978-984,共7页
The simultaneous measurements of Doppler-broadened radiation spectra and lifetime spectra were performed by positron annihilation analysis on Eu-doped Y-123 superconductors.When the doping concentration reaches 30 % a... The simultaneous measurements of Doppler-broadened radiation spectra and lifetime spectra were performed by positron annihilation analysis on Eu-doped Y-123 superconductors.When the doping concentration reaches 30 % and 70 %,the density of defeat and its stress-field reach the maximum for (Y1-xEux) Ba2Cu3O7-y The pinning mechanism of such superconductors is discussed,and the results support the stress pinning mechanism. 展开更多
关键词 y-123 superconductor eu-doping stress-field pinning.
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