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首页> 外文期刊>Physica, C. Superconductivity and its applications >Novel design of a smart magnet/superconductor heterostructure
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Novel design of a smart magnet/superconductor heterostructure

机译：智能磁体/超导体异质结构的新颖设计

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Current distributions in a thin, flat superconductor ring located between two coaxial cylindrical soft magnets of high permeability are studied. Such a heterostructure protects the flux-free state of the ring even in the presence of strong total supercurrents, preventing entry of magnetic flux from the edges of the ring. A Fredholm integral equation of the first kind governing the current distribution in the Meissner state of the ring is derived and solved numerically for different relative permeabilities of the magnets and various distances between the magnets and the ring. This reveals that the current distribution tends to become homogeneous when the relative permeabilities are increased, the effect already saturating at values of these quantites of a few hundred. When the distances between the magnets and the ring are reduced, the current peaks near the circumferences of the ring decrease, thereby contributing to the large total supercurrent and, concomitantly, to the strong longitudinal component of the magnetic field. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 8]
机译：研究了位于高导磁率的两个同轴圆柱软磁体之间的薄而扁平的超导体环中的电流分布。这样的异质结构即使在存在强大的总超电流的情况下也保护了环的无磁通状态，从而防止了磁通从环的边缘进入。对于磁体的不同相对磁导率以及磁体与环之间的不同距离，可以得出第一类弗雷德霍尔姆积分方程，该方程控制环在迈斯纳状态下的电流分布，并对其进行数值求解。这表明，当相对磁导率增加时，电流分布趋于变得均匀，在这些量的几百个值处该作用已经饱和。当磁体和环之间的距离减小时，在环的圆周附近的电流峰值减小，从而有助于大的总超电流，并因此有助于磁场的强纵向分量。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：8]

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