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OALib Journal期刊
ISSN: 2333-9721
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快速加热和冷却法制备的极细多芯Nb_3A1线材的超导特性
, PP. 735-741
Keywords: Nb3A1,临界温度,临界电流,临界磁场
Abstract:
介绍了一种快速加热快速冷却制备接近化学计量比的Nb3A1极细多芯线材的方法用四探针法测定试样的临界温度为17K，用Splitpair型磁体测试了试样随温度和磁场变化的临界电流．归一化后的单位体积钉扎力与所加磁场符合Kramer方程，晶界为可能的磁力线钉扎源由临界电流得到的上临界磁场与温度呈线性关系，外推得到临界温度的计算值与实测值基本一致．通过临界电流与温度和磁场的关系得到了Ic-T-B三维临界界面
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