Fishtail effect studied by ac susceptibility in ErBa2Cu3O7-δ single crystal

被引：1
|
作者：
Cardoso, CA
de Lima, OF
机构：
[1] UFSCar, Dept Fis, BR-13565905 Sao Paulo, Brazil
[2] UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
来源：
JOURNAL OF APPLIED PHYSICS | 2004年 / 95卷 / 03期
关键词：
D O I：
10.1063/1.1636261
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The second magnetization peak (SMP), also known as the fishtail effect, is studied by a scaling procedure for ac susceptibility measurements. From this scaling law the frequency dependence of the critical current J(nu) and the flux creep exponent n can be determined. A striking correlation between n and the SMP is observed, which indicates a clear change in the rate of flux creep around the peak position. This result points to the relevance of the dynamical contribution for the peak formation. However, we could not observe a transition between two different regimes of vortex motion at the SMP. The dependence of the SMP with sample dimensions is also discussed. (C) 2004 American Institute of Physics.
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页码：1301 / 1306
页数：6
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