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磁光图像显示Bi-2223/Ag带材中单根超导芯的宽面两侧边缘分布有较大的超导电流密度,Bi-2223单根超导芯的横截面是纺锤形的,单位宽度上的横截面面积之比与电流密度在横截面上不同部分的分布之比相当.高的电流密度在单根超导芯两侧的分布可能是由单芯横截面的形状引起的.

参考文献

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[3] A E Pashiski;A A Polyanskii;A Gurevich;J.A.Parrell,D.C.Lar balestier .Magnetic granularity,percolation and preferential current flow in a silver sheathed Bi1.8Pb0.4Sr2Ca2Cu3O8+x tape[J].Physica C,1995,246:133X.
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