由高温超导体电阻转变计算热激活能的新方法

A New Method to Extract the Activation Energy from Resistance Transition in High Temperature Superconductors

提出了从高温超导体电阻转变曲线中直接计算热激活能的一个新方法,利用提出的方法重新分析了Y-123单晶超导体的电阻转变曲线。结果表明,热激活能满足U(T,H)=t[(1-t)/t]mH-β,其中m=3.4且比值m/β=α为一常数。不同磁场下logρ与[(1-t)/t]mH-m/α的函数关系在热激发区域被约化到同一条直线上,有力的支持了文中提出的研究方法。

A direct method to calculate the activation energy from the resistance transition is proposed for high temperature superconductors. This method is applied to the resistance transition of Y-123 single crystal superconductor. The activation energy is found to be U（T,H） =t[ （1 -t）/t]mH^-β, where m =3.4 and the ratio of m/β = a is a constant. The plot of logo vs. [ （ 1 -t）/t] mH^-m/α under different magnetic fields is scaled onto a straight line in the activation area, which supports the feasibility of the proposed method.