Flux trapping in a ring-shaped YBCO bulk by pulsed field magnetization
Flux trapping in a ring-shaped YBCO bulk by pulsed field magnetization
复制标题
通过脉冲场磁化在环形 YBCO 块体中捕获磁通
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
H. Ohsaki
中科院分区：
文献类型：
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作者：
M. Fabbri;P. G. Albano;M. Pretelli;F. Negrini;H. Ohsaki
可以使用小线圈施加脉冲磁场以产生用于高Tc超导体（HTS）的磁化的强磁场，所述高Tc超导体（HTS）用作飞轮和马达中的准永磁体。对两种采用脉冲磁场磁化（PFM）工艺制备的环形Y-Ba-Cu-O块材的动态电磁行为进行了实验研究和分析。将PFM工艺捕获在块体中的磁通量与场冷工艺捕获的磁通量进行了比较。然后，这两种情况下进行了分析与基于有限元法（FEM）的数值模型。利用幂律模型将电场与超导体内部的电流密度联系起来。考虑了临界电流密度对磁场强度的依赖关系。对实测结果和计算结果进行了比较和讨论。
A pulsed magnetic field can be applied using small coils to generate a strong magnetic field for the magnetization of the high-Tc superconductors (HTS) to be used as quasi-permanent magnets in flywheels and motors. The dynamic electromagnetic behavior of two melt-processed ring-shaped Y-Ba-Cu-O bulks using the pulsed field magnetization (PFM) process has been experimentally investigated and analyzed. The flux trapped in the bulk by PFM process was compared to the flux trapped by field cooling process. Both cases then have been analyzed with a numerical model based on the finite-element method (FEM). The power-law model was utilized to relate the electric field to the current density inside the superconductor. The dependence of the critical current density on the magnetic field density was taken into account. Measured and calculated results are compared and discussed.