超导磁悬浮实验原理简析

A brief analysis for the principle of superconducting magnetic levitation experiments

超导磁悬浮现象的物理本质是超导体磁矩在轨道磁性峡谷或磁性陷阱的非均匀磁场中受到的电磁力与其重力的稳定平衡.非理想第二类超导体块的磁矩由于钉扎作用在一定条件下既可表现为抗磁性磁矩又可表现为顺磁性磁矩,因此,它既可以实现磁悬浮又可以实现磁倒挂.

The phenomenon of superconducting magnetic levitation is essentially that the force of the magnetic moment of a superconductor in an inhomogeneous magnetic field equalizes to its gravity accurately. Because the pinning effect,the magnetic moment of the imperfect type-II superconductor is of diamagnetism or paramagnetism as the magnetic field＇s change,so the superconductor may appear to be suspended over a magnetic gorge,or flied below the magnetic gorge.