Resistivity-temperature characteristics of sol gel YBa2Cu3Oy samples synthesized in flowing oxygen atmosphere
Zhou Zeng-Jun (周增均)a, Zhou Zuo-Wei (周卓为)a, Zhou Liang-Yu (周良玉)a, Lin Li (林莉)b, Li Xing-Guo (李星国)b, Feng Qing-Rong (冯庆荣)a
a School of Physics and State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China; b Department of Chemistry, Peking University, Beijing 100871, China
Abstract The relationship of resistivity versus synthesizing temperature of sol gel YBa$_2$Cu$_3$O$_y$ samples was studied when prepared under flowing oxygen conditions. A set of high-temperature $\rho-T$ curves was obtained for the whole process. After the sample finished the test measuring, its resistivity was $\rho_{300}=9.83\times10^{-3 }\Omega\cdot$cm at room temperature. The $\rho-T$ curve also showed that the orthorhombic-tetragonal phase transformation of sol-gel YBa$_2$Cu$_3$O$_y$ sample occurred at 581℃ for the sample in the rising temperature process, but at 613℃ in the cooling process, lower than that of the samples made by using the conventional powder metallurgy methods.
Received: 27 April 2004
Revised: 24 June 2004
Accepted manuscript online:
(Effects of material synthesis, crystal structure, and chemical composition)
Fund: Project supported by China National Centre for Research and Development of Superconductivity (Grant No BKBRSF G1999064602).
Cite this article:
Zhou Zeng-Jun (周增均), Zhou Zuo-Wei (周卓为), Zhou Liang-Yu (周良玉), Lin Li (林莉), Li Xing-Guo (李星国), Feng Qing-Rong (冯庆荣) Resistivity-temperature characteristics of sol gel YBa2Cu3Oy samples synthesized in flowing oxygen atmosphere 2004 Chinese Physics 13 1957
Different behavior of upper critical field in Fe1-xSe single crystals Shunli Ni(倪顺利), Wei Hu(胡卫), Peipei Shen(沈沛沛), Zhongxu Wei(魏忠旭), Shaobo Liu(刘少博), Dong Li(李栋), Jie Yuan(袁洁), Li Yu(俞理), Kui Jin(金魁), Fang Zhou(周放), Xiaoli Dong(董晓莉), Zhongxian Zhao(赵忠贤). Chin. Phys. B, 2019, 28(12): 127401.
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.