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我们测量了千赫兹范围内超导掺Pr系列的Bi2 Sr2 Ca1 -xPrxCu2 Oy 单晶从液氮温度至室温的微结构弛豫谱 ,发现该样品在 1 2 0K附近存在一个损耗峰P .该峰的强度先随Pr含量x的增加而变大 ,但到达x～ 0 .1 1 0 .1 7之间时 ,出现最大值 ,而后又随x的增加而减小 .这种行为与超导转变温度Tc 与x的关系一致 ,这表明该峰与超导机制密切相关 .文中还对该峰的机制进行了讨论 .
We measured the microstructure relaxation of the superconducting Pr-doped Bi2Sr2Ca1-xPrxCu2Oy single crystal from liquid nitrogen temperature to room temperature in the kilohertz range and found that there was a loss peak P around the 120K The intensity first increases with the increase of Pr content x, but reaches the maximum value when it reaches x ~ 0 .1 1 0 .1 7, and then decreases with the increase of x. This kind of behavior and superconducting transition The relationship between temperature Tc and x is consistent, which indicates that the peak is closely related to the superconducting mechanism. The mechanism of the peak is also discussed.