测量了 2H Nb0 .9Ta0 .1 Se2 单晶样品在不同电流下电压随磁场变化的曲线V(H) ,并从V(H)曲线得到V(I)数据 .使用标度关系V =α(I-Ic)β进行了拟合 ,得到了临界电流随磁场Ic(H)和微分电阻随磁场Rd 的变化关系 .在微分电阻随磁场变化的曲线中 ,电流较大时 ,靠近上临界磁场Hc2 附近出现一个强峰 ,而在低电流下 ,该峰消失 .同时在临界电流峰效应区的起始处出现一小峰 .实验结果表明掺Ta后 ,涡旋体系的动力学特性发生了显著的变化 . The V (H) curves of the 2H Nb0 .9Ta0.1Se2 single crystal samples at different currents were plotted against the magnetic field and V (I) data were obtained from the V (H) curve. The scaling relationship V = α (I -Ic) β, we get the relationship between the critical current and the magnetic field Rd (Ic (H)). When the current in the curve of the differential resistance changes with the magnetic field, the current will be close to the upper critical magnetic field Hc2 A peak appeared at low current, but disappeared at low current, while a small peak appeared at the beginning of the peak current.The experimental results show that the kinetic characteristics of the vortex have changed remarkably when doped with Ta.