Study on the superconducting micro-flux-jumps which successively appear around zero-field at low temperatures

对于具有自旋三重态超导电性的“超清洁”单晶，在零场附近的低温磁滞磁化过程中相继出现微小的磁通跳跃，这与自旋单重态超导体中的“超清洁”单晶不同。这表明，在零场附近的磁滞磁化过程中相继出现的微小磁通跳跃，是自旋三重态超导体具有移动d磁畴的特征，这与自旋三重态超导体中序参数的内部自由度有关。

For the" superclean" single crystals of Sr_2RuO_4 and UPt_3 with spin-triplet superconductivity, tiny flux-jumps successively appear in the hysteretic magnetization around zero-field at low temperatures, unlike to the case of" superclean" single crystals in spin singlet superconductors. This suggests that the tiny flux-jumps, which successively appear in the hysteretic magnetization around zero-field, are characteristic of the spin-triplet superconductors with mobile d-domain which is related to the internal degree of freedom in the order parameter in the spin-triplet superconductors.