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超导体-铁磁体超材料在静磁场中具有有效的磁屏蔽特性.大部分超材料都是由超导材料和铁磁材料组成,而这种材料的性能主要取决于构成材料的结构,几何尺寸及每种材料的磁导率.本论文将麦克斯韦方程和超材料的设计结合起来,提出一种超导体-铁磁体超材料系统.该系统由两种材料的同轴圆柱体构成,我们研究该系统在直流磁场环境下的屏蔽特性.通过改变屏蔽圆柱体的几何尺寸,我们计算出屏蔽效能从而得到最优屏蔽结构.本论文的工作旨在为核磁共振成像及降低医学器械中的磁场特性提供有效的理论依据.
Superconductors - ferromagnetic metamaterials have effective magnetic shielding properties in static magnetic fields.Most metamaterials consist of superconducting and ferromagnetic materials, and the properties of such materials depend primarily on the structure, geometry and The permeability of each material.In this paper, we combine the Maxwell equation with the design of metamaterials to propose a superconductor-ferromagnetic metamaterial system.The system consists of a coaxial cylinder of two materials, and we study the system in Shielding characteristics in DC magnetic field environment By changing the geometric size of the shielding cylinder, we calculate the shielding effectiveness to get the optimal shielding structure.This dissertation aims to provide an effective method for magnetic resonance imaging and reduce the magnetic field characteristics in medical instruments Theoretical basis.