| 压力对不同Tc的Bi2+xSr2Ca1-xCu2Oy单晶超导电性的影响 |
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| 引用本文： | 刘振兴,赵忠贤.压力对不同Tc的Bi2+xSr2Ca1-xCu2Oy单晶超导电性的影响[J].高压物理学报,1991,5(3):182-185. |
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| 作者姓名： | 刘振兴 赵忠贤 |
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| 作者单位： | 中国科学院物理研究所
(刘振兴，邵岫瑜，李建奇，熊季午，贾顺连)，国家超导实验室(赵忠贤) |
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| 摘 要： | 在研究BiSrCaCuO超导单晶的过程中，我们发现材料的实际化学组分与理想的2212相配比组分有着一定的差别，正是这种成分偏析造成了样品的Tc与结构的不同。本文研究了在压力下不同Tc的样品随压力改变Tc的变化关系，发现偏析越大、Tc越低的样品的dTc/dp也越大，而越接近理想组分，则dTc/dp越趋于最小值，还可以从此推断出BiSrCaCuO理想单晶材料的Tc最佳值。压力对超导电性的这种影响可能与耦合链长的变化有关。
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| 关 键 词： | 起始超导转变温度 偏析 交流磁化率 |
| 收稿时间： | 1991-06-14; |
EFFECTS OF HIGH PRESSURES ON Bi_(2+x) Sr_2 Ca_(1-x) Cu_2 O_y SUPERCONDUCTING SINGLE CRYSTALS WITH DIFFERENT T_c |
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| Liu Zhenxing,Shao Xiuyu,Li Jianqi,Xiong Jiwu,Jia Shunlian,Zhao Zhongxian.EFFECTS OF HIGH PRESSURES ON Bi_(2+x) Sr_2 Ca_(1-x) Cu_2 O_y SUPERCONDUCTING SINGLE CRYSTALS WITH DIFFERENT T_c[J].Chinese Journal of High Pressure Physics,1991,5(3):182-185. |
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| Authors: | Liu Zhenxing Shao Xiuyu Li Jianqi Xiong Jiwu Jia Shunlian Zhao Zhongxian |
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| Institution: | Institute of Physics, Academia Sinica, Beijing 100080, China |
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| Abstract: | Under high pressures the Tc of Bi - Sr - Ca - Cu - O single crystals with different content segregation will change differently. We found that, samples with larger segregation and lower Tc exhibit higher dTc/dp. When the sample approaches to the ideal composition, it exhibit lowest dTc/dp . The high pressure effects on Tc may be closely related to the variation of bonding length . |
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| Keywords: | superconducting transition onset temperature segregation a c susceptibility |
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