Magnetic Levitation
磁悬浮
Magnetic fields are actively excluded from superconductors (Meissner effect). If a small magnet is brought near a superconductor, it will be repelled becaused induced supercurrents will produce mirror images of each pole. If a small permanent magnet is placed above a superconductor, it can be levitated by this repulsive force. The black ceramic material in the illustrations is a sample of the yttrium based superconductor.
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磁场被主动排斥出超导体（迈斯纳效应）。如果将一个小磁体靠近超导体，它会被排斥，因为诱导的超电流会产生每个极的镜像。如果将一个小的永磁体放在超导体上方，它可以通过这种排斥力被悬浮。图中黑色陶瓷材料是yttrium基超导体的一个样本。
Superconductivity concepts
索引 超导概念
| HyperPhysics***** Condensed Matter
HyperPhysics ***** 凝聚态物理 | R Nave |
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