Peak effect at microwave frequencies in swift heavy ion irradiated YBa2Cu3O7-δ thin films

被引：0
作者：
Banerjee, T
Bhangale, A
Kanjilal, D
Pai, SP
Pinto, R
机构：
[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[2] Inst Sci, Dept Phys, Bombay 400032, Maharashtra, India
[3] Ctr Nucl Sci, New Delhi 110067, India
来源：
PRAMANA-JOURNAL OF PHYSICS | 2002年 / 58卷 / 5-6期
关键词：
microwave surface resistance; superconductors; peak effect;
D O I：
10.1007/s12043-002-0198-x
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The vortex dynamics at microwave frequencies in YBa2Cu3O7-delta (YBCO) films have been studied. We observe a peak in the microwave (4.88 and 9.55 GHz) surface resistance in some films in magnetic fields up to 0.8 T. This is associated with the 'peak-effect' phenomenon and reflects the order-disorder transformation of the flux line lattice near the transition temperature. Introduction of artificial pinning centers like columnar defects created as a result of irradiation with 200 MeV Ag ion (at a fluence of 4 x 10(10) ions/cm(2)) leads to the suppression of the peak in films previously exhibiting 'peak effect'.
引用
收藏
页码：949 / 954
页数：6
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