| 2H-Nb0.9Ta0.1Se2中磁通涡旋输运的标度行为 |
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| 引用本文： | 张波,田明亮,张裕恒. 2H-Nb0.9Ta0.1Se2中磁通涡旋输运的标度行为[J]. 物理学报, 2001, 50(11): 2221-2225 |
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| 作者姓名： | 张波 田明亮 张裕恒 |
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| 作者单位： | 中国科学技术大学结构分析开放实验室,合肥230026 |
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| 基金项目： | 国家重点基础研究专项基金(批准号:G19990646)资助的课题. |
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| 摘 要： | 测量了2H-Nb0.9Ta0.1Se2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.同关键词：磁通涡旋标度定律临界电流峰效应
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| 关 键 词： | 磁通涡旋 标度定律 临界电流峰效应 |
| 收稿时间： | 2001-05-17 |
| 修稿时间： | 2001-05-17 |
SCALING BEHAVIOURS OF VORTEX TRANSPORT IN 2H-Nb0.9Ta0.1Se2 |
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| ZHANG BO,TIAN MING-LIANG and ZHANG YU-HENG. SCALING BEHAVIOURS OF VORTEX TRANSPORT IN 2H-Nb0.9Ta0.1Se2[J]. Acta Physica Sinica, 2001, 50(11): 2221-2225 |
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| Authors: | ZHANG BO TIAN MING-LIANG ZHANG YU-HENG |
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| Abstract: | The field dependence of voltage V(H) in a 2H-Nb0.9Ta0.1Se2 single crystal at various currents was measured and converted to current-voltage data V(I). Then the scaling law V=α(I-Ic)β was applied to extract the critical current Ic(H) and differential resistance Rd(H). The results show a peak on the differential resistance vs.H curve near Hc2 when the applied current is high, but for a lower current it appears near the onset of peak effect region. This indicates that the new types of pinning centers generated by doped Ta significantly alter the dynamic properties of the vortex system. |
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| Keywords: | vortex scaling law peak effect |
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