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

页码：201 / 206

页数：6

共 36 条

[1]

AFANASEV MM, 1990, JETP LETT+, V51, P600

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