Activation energy of Bi2Sr2Ca(Cu1-xFex)2O8+d thin films

被引：2
|
作者：
Ilonca, G [1 ]
Pop, AV [1 ]
Stiufiuc, G [1 ]
Lung, C [1 ]
Stiufiuc, R [1 ]
机构：
[1] Univ Babes Bolyai, Fac Phys, R-3400 Cluj Napoca, Romania
来源：
MODERN PHYSICS LETTERS B | 2001年 / 15卷 / 22期
关键词：
D O I：
10.1142/S0217984901002956
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The scaling behavior of the effective activation energy U(T, H) of epitaxial c-axis oriented Bi2Sr2Ca(Cu1-xFex)(2)O8+d thin films with 0 < x less than or equal to 0.02 has been studied as a function of temperature and magnetic field. It has been found that the activation energy scales as U(H, T) = U-0 (1 - t)H-m(n) with exponent m = 1.15 +/- 0.03 and n = - 1/2. The field and temperature dependence of the activation energy, as well as its overall magnitude is consistent with a model in which U(T, H) arises from plastic deformations of viscous flux liquid above the vortex-glass transition temperature.
引用
收藏
页码：959 / 964
页数：6
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