| 低场下Bi系高温相超导体的不可逆线研究 |
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| 引用本文： | 李存建,储少岩.低场下Bi系高温相超导体的不可逆线研究[J].北京工业大学学报,1995,21(1):87-92. |
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| 作者姓名： | 李存建 储少岩 |
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| 作者单位： | 北京工业大学计算机学院，北京航空航天大学 |
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| 摘 要： | 采用外加直流磁场测量超导样品交流磁化率的方法，通过对外场ＩＩ和起始抗磁转变温度ＴＰ的测量，获得了Ｂｉ系高温相超导块材、粉末和晶体样品在低场、液氮温区的不可逆线。块材、粉末和品体样品的不可逆线分别为： 对不可逆线的意义、被测３种样品磁通钉扎强弱和特性及样品微结构的关系等相关问题进行了分析和讨论。
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| 关 键 词： | 超导体，不可逆线，磁通钉扎 |
Study on the Irreversible Line of Bi-based High-T_c Phase Superconductors at Low Magnetic Field |
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| Abstract: | Abstract:The irreversible lines of Bi-based high-T phase superconductor samples in the form of bulk,powder and crystal slices are obtained by measuring a.c.susceptibility of the samples at the applied d.c.magnetic field.The irreversible lines of the bulk,powder and crystal slice samples at a low magnetic field and LN2 temperature range are(1-TP/ Tc) ∝HO.68、(1-Tp/Tc）∝H0.61 and(1-Tp/Tc）∝H0.40respectively.The significane of the irreversible line,and,the strength and characteristic of the flux pinning for the three kinds of samples are discussed.The retationship hips between these and the microscopic structure of the samples are also aralyzed.Kcywords:superconductor;irreversible line;flux pinning |
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