【摘要】 在 32～ 34K温度和 0 .5T初始磁场中 ,MgB2 超导块材的磁弛豫性质通过剩余磁化强度M随时间t的变化进行了研究 .在初始阶段 ,M～lnt明显偏离线性 ,磁通运动接近Zeldov对数模型 .足够长的时间后 ,M～lnt呈现很好的线性 ,磁通运动符合Anderson Kim模型 .更多还原

【Abstract】 At 32～34K and 0.5T initial magnetic field, the magnetic relaxation behavior of superconducting MgB-2 bulk was investigated by the residual magnetization as function of time. At the beginning, the plots of magnetization vs time (on a logarithmic scale) apparently deviate from linearity and the flux motion approaches to Zeldov logarithmic model model. Then the plots will present excellent linearity after enough long time, and the flux motion is dominated by Anderson-Kim model.更多还原