THERMALLY-ACTIVATED VORTEX DYNAMICS IN BI2CASR2CU2O8+DELTA STUDIED BY COMPLEX SUSCEPTIBILITY MEASUREMENTS

被引：33

作者：

EMMEN, JHPM

BRABERS, VAM

DEJONGE, WJM

机构：

[1] Department of Physics, Eindhoven University of Technology

来源：

PHYSICA C | 1991年 / 176卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90706-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Complex AC magnetic susceptibility has been measured on Bi2CaSr2Cu2O8+delta single crystals with h(AC), H(DC) parallel-to c-axis. It will be shown that field, frequency and temperature dependence of both chi' and chi" in a constant but sufficiently large DC magnetic field can quantitatively be described by thermally-activated flux flow (TAFF) provided that a narrow distribution of activation energies is implemented. From the frequency dependence of the AC chi-transition, a power law for the DC field dependence of the activation energy has been found, with an exponent -1/4.

引用

页码：137 / 146

页数：10

共 23 条

[1] THEORY OF FLUX CREEP IN HARD SUPERCONDUCTORS [J].