We investigated the current-voltage (E-J) characteristics in melt-textured YBCO strips by measuring the magnetic-field-sweep rate dependence of magnetization. The E-J curves exhibited power-law behavior in the electric-field window of E=1-~-10-10~-5 V/m. We alos derived the E-J characteristics in the lower Ewindow from the flux-creep data. The wide-range E-J characteristics exhibited near power-law behavior, but there was a slight downward curvature in the logE vs logJ plots. We observed a drastic decrease of flux creep by decreasing temperature slightly in a fixed magnetic field.
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机译：我们通过测量磁化强度对磁场扫描速率的依赖关系，研究了熔融织构YBCO带材中的电流-电压（E-J）特性。 E-J曲线在E = 1-〜-10-10〜-5 V / m的电场窗口中表现出幂律特性。我们从通量-蠕变数据中推导出较低的Ewindow中的E-J特性。宽范围的E-J特性表现出接近幂律的行为，但是logE与logJ曲线图中存在轻微的向下弯曲。我们观察到在固定磁场中通过略微降低温度，磁通蠕变急剧降低。
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