ACTIVATION-ENERGIES IN SUPERCONDUCTING HIGH-TEMPERATURE CERAMICS

被引：1
|
作者：
MEHDAOUI, A
BERLING, D
BOLMONT, D
LOEGEL, B
机构：
[1] Laboratoire de Physique et de Spectroscopic Electronique, URA 1435, Faculté des Sciences et Techniques, 68093 Mulhouse Cédex
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1995年 / 34卷 / 2-3期
关键词：
SUPERCONDUCTIVITY PEROVSKITES; HIGH TEMPERATURE SUPERCONDUCTIVITY; MEISSNER EFFECT; MAGNETIC MEASUREMENTS;
D O I：
10.1016/0921-5107(95)01249-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Low field a.c. susceptibilities of HgBa2Ca2Cu3O8+delta (Hg-1223) and Bi2Sr2CaCu2O8+delta (Bi-2212) have been studied. The loss peak of chi '', relevant to intergranular pinning, shifts to higher temperatures for increasing frequencies. The results can be fitted with an Arrhenius law, leading to activation energies E(a) approximate to 1 eV, but the hopping frequencies f(0) are not realistic. More realistic values can be obtained by introducing a Fulcher law or a power law which is also characteristic of strongly interacting systems.
引用
收藏
页码：132 / 137
页数：6
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