Magnetic instabilities in high-temperature superconductors under rapidly varying magnetic fields.
Magnetic instabilities in high-temperature superconductors under rapidly varying magnetic fields.
复制标题
快速变化磁场下高温超导体的磁不稳定性。
DOI：
10.1103/physrevb.47.6047
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
A. Menovsky
中科院分区：
文献类型：
--
作者：
Alexander Gerber;J. N. Li;Z. Tarnawski;J. Franse;A. Menovsky
研究了高温超导化合物LaS2 CuO4和Bi2 Sr2 CaCu2 O单晶样品在快速变化磁场下的不可逆磁化强度。可以确定三种类型的行为来增加场的变化率：第一，接近临界态的稳定区域；中等斜率时的磁不稳定性或跳跃；以及高扫描速率下具有强烈抑制磁化的第二稳定区域。讨论了破坏临界状态的条件和失稳时的磁通穿透动力学。
The irreversible magnetization of single-crystalline samples of the high-temperature superconducting compounds LaSr 2 CuO 4 and Bi 2 Sr 2 CaCu 2 O has been studied under rapidly varying magnetic fields. Three types of behavior can be identified for increasing rates of the field variation: first, a stable regime close to the critical state; magnetic instabilities or jumps for intermediate ramp rates; and a second stable regime with a strongly suppressed magnetization for high sweep rates. The conditions for breaking the critical state and the dynamics of the flux penetration at the instability are discussed