TRAPPING AND RELAXATION OF INTERGRAIN AND INTRAGRAIN VORTICES IN YBA2CU3O7-DELTA

被引：15
|
作者：
BLINOV, EV [1 ]
LAHDERANTA, E [1 ]
LAIHO, R [1 ]
STEPANOV, YP [1 ]
机构：
[1] AF IOFFE PHYSICOTECH INST, ST PETERSBURG 194021, USSR
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1992年 / 199卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(92)90560-Y
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Isothermoremanent magnetization and its relaxation with time have been investigated in ceramics and powders of YBa2Cu3O7-delta at different temperatures after magnetizing the sample in a field of H(ext) < 600 Oe. From the results for powder samples we obtained for intragranular vortices the value of the effective pinning energy U(eff) almost-equal-to 0.7 eV, independent of H(ext). In the ceramic material U(eff) was found to depend strongly on the applied field reaching a value of 5 eV at 10 Oe and decreasing steeply when the magnetizing field was increased. The field dependence is discussed by using a model which takes into account the interaction between vortices.
引用
收藏
页码：201 / 206
页数：6
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