【摘要】 通过对具有不同层间耦合强度的Bi2 2 12单晶样品的磁滞回线的测量 ,得到了样品的临界电流密度Jc 随层间耦合强度和磁场的变化关系 .实验结果显示 ,样品的层间耦合减弱 ,Jc明显减小 .同时发现Jc 与磁场间存在Jc ∝exp(-Hα)关系 ,进一步分析表明 ,Jc 的这种磁场依赖关系是对数钉扎势垒模型的必然结果 .更多还原

【Abstract】 The dependences of critical current density J\-c on the interlayer coupling strength and magnetic field in Bi2212 crystals were obtained by measuring the magnetic loop of the crystals with different interlayer coupling strength. It is revealed that J\-c decreases with decreasing of the interlayer coupling in the crystals. The relation of J\-c∝ exp (-H\+α) is also found in the crystals, and further analysis indicated that it is the results of Zeldov pinning potential model.更多还原