Magnetic relaxation of Nd1.85Ce0.15CuO4-δ single crystal

被引：2
|
作者：
Nugroho, AA
Sutjahja, IM
Tjia, MO
Menovsky, AA
de Boer, FR
Frause, JJM
机构：
[1] Univ Amsterdam, Van Der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands
[2] Inst Teknol Bandung, Jurusan Fisiku, Bandung 40132, Indonesia
来源：
PHYSICA C | 2000年 / 332卷 / 1-4期
关键词：
magnetic relaxation; second peak; flux creep; vortex dynamics;
D O I：
10.1016/S0921-4534(99)00706-6
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The vortex dynamics of a Nd1.85Ce0.15CuO4-delta single crystal was investigated in terms of its magnetic relaxation process. The measurement of time dependent magnetization was carried out in a magnetic field of 750 Oe applied parallel to the c-axis with temperature varying from 5 to 17 K, covering the second peak region and extending below as well as above its temperature range. The normalized relaxation rates S determined from the FC and ZFC data generally exhibit asymmetrical behaviours, and both feature narrow and shallow valleys, interrupting the otherwise monotonic rise of the curve. In particular, the ZFC data For S(T) displays an additional maximum somewhat similar to those found in BSCCO and TBCCO. The data are further analyzed on the basis of collective flux creep model. (C) 2000 Elsevier Science B.V. Ail rights reserved.
引用
收藏
页码：374 / 377
页数：4
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