Crossing in the magnetic force-gap hysteresis curve of magnetic levitation systems with a high-Tc superconductor
Crossing in the magnetic force-gap hysteresis curve of magnetic levitation systems with a high-Tc superconductor
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高温超导体磁悬浮系统磁力间隙磁滞曲线的交叉
DOI：
10.1016/j.physc.2010.03.011
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发表时间：
2010-05
影响因子：
1.7
通讯作者：
苟晓凡
中科院分区：
文献类型：
--
作者：
苟晓凡
对于由高T{sub c}超导体和永磁体组成的磁悬浮系统，磁力与两部分之间间隙的关系曲线称为磁滞回线，即接近部分和远离部分包围一个完整的部分，一般情况下这两部分不相交。然而，在某些特殊情况下，会出现这种交叉，并使整个环路破裂。本文通过对大量物理和几何参数下的磁力-间隙曲线进行数值模拟，发现了两个典型的交叉点。为了研究交叉并探究其物理原因，对于其中一个交叉，进一步计算了超导体中的电流密度，并获得了交叉出现附近间隙处的电流大小和矢量分布。根据这些计算结果并经过充分讨论，得出结论：磁力-间隙磁滞曲线的交叉是由于外加磁场对超导体的不完全和不充分的穿透造成的。
For the magnetic levitation system consisting of a high-T{sub c} superconductor and permanent magnet, the relation curve of magnetic force with gap between these two components is known as a hysteresis loop, that is, the approaching and departing portions envelop a complete one, and generally these two portions do not cross each other. However, in some special cases this crossing arises, and makes the complete loop broken. In this paper, by the numerical simulation of the magnetic force-gap curve in large numbers of physical and geometrical parameters, two typical crossings were found. To investigate the crossing and explore its physical causes, for one of the crossings, the current density in the superconductor was further calculated and its magnitude and vector distribution at the gaps nearby where the crossing arises were obtained. Based on these calculation results and an adequate discussion, the conclusion was induced that the crossing in the magnetic force-gap hysteresis curve results from applied magnetic field's incomplete and insufficient penetrating in superconductor.
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影响因子：
--
作者：
Gou Xiao-fan;Yang Yong;Zheng Xiao-jing
通讯作者：
Gou Xiao-fan;Yang Yong;Zheng Xiao-jing
DOI：
10.1016/0921-4534(96)00400-5
发表时间：
1996-09
影响因子：
1.7
作者：
Alvaro Sanchez;C. Navau
通讯作者：
Alvaro Sanchez;C. Navau
影响因子：
1.7
作者：
Xingyi Zhang;Youhe Zhou;Jùn Zhou
通讯作者：
Xingyi Zhang;Youhe Zhou;Jùn Zhou
影响因子：
4
作者：
F. Moon;M. M. Yanoviak-M.;R. Ware
通讯作者：
F. Moon;M. M. Yanoviak-M.;R. Ware
影响因子：
3.2
作者：
J. Hull;A. Cansiz
通讯作者：
J. Hull;A. Cansiz