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

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)...

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Published inScience China. Mathematics Vol. 40; no. 9; pp. 978 - 984
Main Author 李阳 王耘波 唐春光 马庆珠 曹国辉 魏龙 王文华 张天保
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 1997
Subjects
Eu-doping
Pinning
Positron annihilation
Radiation spectra
stress-field
superconductor
Superconductors
Y-123
YBCO superconductors
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ISSN1674-7283
1006-9283
1869-1862
DOI10.1007/BF02878678

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Summary: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.
Bibliography:LI Yang,WANG Yunbo,TANG ChunguangMA Qingzhu CAO Guohui(Department of Materials Physics,University of Science and Technology Beijing,Beijing 100083,China)WEI Long WANG Wenhua and ZHANG Tianbao(Laboratory of Nuclear Analysis Techniques,Chinese Academy of Sciences,Beijing 100080,China) Also at National Laboratory for Superonductivity,Chinese Academy of Seiences,Beijing 100080,China.
11-5837/O1
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ISSN:1674-7283
1006-9283
1869-1862
DOI:10.1007/BF02878678