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PAT study on stress-field pinning in high-Tc superconductors

PAT study on stress-field pinning in high-T_c superconductors
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摘要 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. 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.
出处 《Science China Mathematics》 SCIE 1997年第9期978-984,共7页 中国科学:数学(英文版)
关键词 Y-123 SUPERCONDUCTOR Eu-doping stress-field pinning. Y-123 superconductor,Eu-doping,stress-field pinning.
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