摘要
伴随着世界范围内对高温超导长线（带）化技术研究的热潮，银包套材料的Ｉ－Ｖ特性的研究也得到了很大的发展，研究主要集中在揭示样品微结构（如不均匀性）、Ｎ－Ｓ转变特性和样品中磁通运动的情况，从磁通蠕动理论出发，对Ｉ－Ｖ关系描述有中模型，即幂函数律Ｅ－Ｅ０（Ｊ／Ｊ０）＾ｎ和指数律Ｅ＝Ｅ０ｓｉｎｈ（Ｊ／Ｊ０）。大量实验可用前者很好地解释，样品的不均匀性可显著地影响幂指数ｎ，正如砖墙结构模型预言。
Accompanied by the world-wide investigation tide of long continuous lengths of conductor based on high-Tc materials,progress was achieved in the investigation of I-V characteristics of HTSC/Ag theathed tapes.The study on it focus on revealing the microstructure of the sample (e.g.inhomo-geneities),N-S transition properties a.nd flux motion in it.Derived from flux creep theory,there are two models describing the I-V characteristics,that is,the power law E = E0 (J/J0) nand the hyperbolic form E = E0 sinh( J/J0).Most experiments can be explained by the former model.The inhom-ogeneities of samples can significently influence the exponent n of the power law,which was predicted by the brick wall model.Review was done to the above models.
出处
《低温与超导》
CAS
CSCD
北大核心
1993年第4期13-19,共7页
Cryogenics and Superconductivity
