Studies of synthesizing behaviors and superconductivity
of sol-gel YBaCuO samples in flowing
oxygen atmosphere

doi:10.1007/s11467-008-0009-z

Frontiers of Physics in China - Selected Publications from Chinese Universities

2008, Vol. 3

Issue (1): 55-60 https://doi.org/10.1007/s11467-008-0009-z

本期目录

Studies of synthesizing behaviors and superconductivity of sol-gel YBaCuO samples in flowing oxygen atmosphere

LUO Ting¹, ZHANG Yi¹, ZHANG Yue-yang¹, FENG Qing-rong¹, LI Xing-guo², LIN Li²

1.School of Physics and State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University; 2.School of Chemistry and Molecular Engineering, Peking University

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Abstract：Systematic studies of synthesizing behaviors of sol-gel YBa₂Cu₃O_7-x samples in flowing oxygen atmosphere and their superconductivity have been performed. A set of high temperature ?-T curves has been obtained for the whole synthesizing process. After four rounds of synthesizing, the resistivity of the sample was around ? = 1.00 × 10^-3 ?cm at room temperature. The ?-T curve of the fourth round shows that the orthorhombic to tetragonal phase transformation of the sample occurs around 600°C, which is lower than that of the YBa₂Cu₃O_7-x sample prepared by conventional solid-state reaction method. Other measurements, such as X-ray diffraction, SEM measurement and low temperature R-T and M-T measurement, were also performed. And the R-T and M-T measurement results suggest that during the synthesizing process, there exist some state at which the sample has better superconductivity than the other states. Moreover, we found screw dislocations presenting on the sample broken surface from the SEM images. This will change the concept that the screw dislocations can only grow on the surface of the YBCO thin films and single crystals.

出版日期: 2008-03-05

引用本文:

. Studies of synthesizing behaviors and superconductivity of sol-gel YBaCuO samples in flowing oxygen atmosphere[J]. Frontiers of Physics in China - Selected Publications from Chinese Universities, 2008, 3(1): 55-60.
LUO Ting, ZHANG Yi, ZHANG Yue-yang, FENG Qing-rong, LI Xing-guo, LIN Li. Studies of synthesizing behaviors and superconductivity of sol-gel YBaCuO samples in flowing oxygen atmosphere. Front. Phys. , 2008, 3(1): 55-60.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-008-0009-z
https://academic.hep.com.cn/fop/CN/Y2008/V3/I1/55

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