Local magnetic relaxation close to the second peak in BSCCO crystals

被引：9
|
作者：
Berry, S
Konczykowski, M
Kes, PH
Zeldov, E
机构：
[1] LEIDEN UNIV,KAMERLINGH ONNES LAB,NL-2300 RA LEIDEN,NETHERLANDS
[2] WEIZMANN INST SCI,DEPT CONDENSED MATTER PHYS,IL-76100 REHOVOT,ISRAEL
来源：
PHYSICA C | 1997年 / 282卷
关键词：
D O I：
10.1016/S0921-4534(97)80005-6
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Local magnetic relaxation measurements were performed on Bi2Sr2CaCu2O8+x (BSCCO) single crystals using a Hall-sensor array. The recorded field profiles provide unambiguous evidence of a crossover from surface barrier to bulk pinning in the second magnetization peak region. Both contributions to the magnetization exhibit a pronounced relaxation. For fields above the second peak we observe an additional crossover from bulk-pinning at short time scales, with Bean-like profiles, to dome-shape profiles originating from surface barrier at long times.
引用
收藏
页码：2259 / 2260
页数：2
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