The influence of measurement and relaxation time on flux jumps in high temperature superconductors

被引：3
|
作者：
Yang, Xiaobin [1 ,3 ]
Zhou, Youhe [2 ]
Tu, Shandong [3 ]
机构：
[1] Changzhou Inst Technol, Sch Mech & Elect Engn, Changzhou 213002, Jiangsu, Peoples R China
[2] Lanzhou Univ, Coll Civil Engn & Mech, Lanzhou 730000, Gansu, Peoples R China
[3] E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷 / 02期
关键词：
Flux pinning; Flux creep; Magnetic properties; YBA2CU3O7; SINGLE-CRYSTAL; MAGNETIC INSTABILITIES; FIELDS; CREEP;
D O I：
10.1016/j.physc.2009.11.018
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The influence of the magnetization and relaxation time on flux jumps in high temperature superconductors (HTSC) under varying magnetic field is studied using the fundamental electromagnetic field equations and the thermal diffusion equation; temperature variety corresponding to flux jump is also discussed. We find that for a low sweep rate of the applied magnetic field, the measurement and relaxation times can reduce flux jump and to constrain the number of flux jumps, even stabilizing the HTSC, since much heat produced by the motion of magnetic flux can transfer into coolant during the measurement and relaxation times. As high temperature superconductors are subjected to a high sweep rate or a strong pulsed magnetic field, magnetization undergoes from stability or oscillation to jump for different pause times. And the period of temperature oscillation is equal to the measurement and relaxation time. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：109 / 114
页数：6
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