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摘要: 本文选择两块零电阻温度分别为82K 和71K 超导性能不同的簿膜徉品, 同步进行了电阻在外滋场中展宽的测量, 并用Palstra 所提出的Arrhenius 定律研究两样品热激活能的差别。实验发现样品热激活能随磁场增加线性下降. 由测量结果推出的不可逆线仍有B * -(l -T*/T_c_)**3/2形式.
Abstract: Two high T_c_ superconductor YBa_2Cu_3O_7_ thin films, the zero resistance temperature of which were 82K and 7lK respectively, were selected for measurement about resistance broadening. The difference in thermal activation energy of the two samples was analyzed with Arrhenius law auggested by Palstra. We found that the activation energy decreased depending upon increasing magnetic field. The irreversibility line was B * -(l -T*/T_c_)**3/2 deduced from our data.