Magnetic levitation force between a superconducting bulk magnet and a permanent magnet

被引：11
|
作者：
Wang, JJ [1 ]
He, CY [1 ]
Meng, LF [1 ]
Li, C [1 ]
Han, RS [1 ]
Gao, ZX [1 ]
机构：
[1] Peking Univ, Dept Phys, Key Lab Artificial Microstruct & Mesoscop Phys, Beijing 100871, Peoples R China
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2003年 / 16卷 / 04期
关键词：
D O I：
10.1088/0953-2048/16/4/318
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The current density J (rho, z) in a disc-shaped superconducting bulk magnet and the magnetic levitation force F-z(SBM) exerted on the superconducting bulk magnet by a cylindrical permanent magnet are calculated from first principles. The effect of the superconducting parameters of the superconducting bulk is taken into account by assuming the voltage-current law E = E-c(J/J(c))" and the material law B = mu(0)H. The magnetic levitation force F-z(SBM) is dominated by the remnant current density J(2)'(p, z), which is induced by switching off the applied magnetizing field. High critical current density and flux creep exponent may increase the magnetic levitation force F-z(SBM). Large volume and high aspect ratio of the superconducting bulk can further enhance the magnetic levitation force F-z(SBM).
引用
收藏
页码：527 / 533
页数：7
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