LK-99的半磁悬浮和高温超导体的锁定磁悬浮  

Half levitation of LK-99 and locked levitation of high-temperature superconductors

作　　者：陈笃行[1] CHEN Du-Xing(Department of Physics,Autonomous University of Barcelona,Bellaterra 08193,Spain)

机构地区：[1]西班牙巴塞罗那自治大学物理系,贝拉特拉08193

出　　处：《物理》2023年第10期695-704,共10页Physics

摘　　要：基于电磁学和超导物理学的原理和相关实验数据,说明所谓的室温常压超导体LK-99在圆盘状钕铁硼永磁体极面的半悬浮应来源于其中的铁磁杂质碎片所受的转矩和引力。涂覆Y-Ba-Cu-O的高温超导体薄片在这种永磁体磁极上下的锁定悬浮,则起因于不均匀外磁场中超导体位置变化感生的超导电流所受该磁场的位置回复洛伦兹力,而并非迈斯纳效应和所谓的量子锁定的结果。Based on laws in electromagnetism and superconductivity and relevant experimental results,it is explained that the half levitation of the so-called room-temperature ambient-pressure superconductor LK-99 above the upper pole face of a permanent magnet disk originates from the torque and force on the ferromagnetic impurities located in a nonuniform applied magnetic field.The locked levitation or suspension of a coated Y-Ba-Cu-O conductor sample above or below the disk is due to the position recovering Lorentz force on the supercurrent induced by sample movement in the non-uniform field,not to the Meissner effect and so-called quantum locking.

关 键 词：高温超导体 锁定磁悬浮 迈斯纳效应 临界电流 洛伦兹力 

分 类 号：O511.3[一般工业技术—材料科学与工程] O441.2[理学—低温物理]