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Scaling analysis of phase transition in Hg-based superconductor

机译:汞基超导体中相变的尺度分析

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With the vibrating-reed technique, the internal friction (IF) Q(-1) is measured for sing-phase (Hg0.66Pb0.34)Ba2Ca2Cu3O8+x superconductor as a function of temperature at low applied magnetic field up to 0.5 T and as a function of frequency at normal state temperatures. An IF peak associated with flux motion can be found below T-C. The IF peak becomes higher and shifts towards lower temperature with increasing magnetic field. In addition an IF peak is found near 200 K. By scaling analysis we have demonstrated that the internal friction around the peak temperature can be collapsed into a single curve, indicating that the IF peak below T-C is originated from a phase transition associated with a vortex glass transition and a structural phase transition occurs at around 200 K in the superconductor. (c) 2006 Elsevier Ltd. All rights reserved.
机译:使用振动簧片技术,测量了单相(Hg0.66Pb0.34)Ba2Ca2Cu3O8 + x超导体在0.5 G以下低磁场下的内摩擦(IF)Q(-1)与温度的关系,以及在正常状态温度下是频率的函数。可以在T-C以下找到与通量运动相关的IF峰。随着磁场的增加,IF峰值变得更高,并朝着更低的温度移动。此外,在200 K附近发现了一个IF峰。通过比例分析,我们证明了峰温度附近的内摩擦可​​以分解为一条曲线,这表明TC以下的IF峰源自与涡旋相关的相变。在超导体中,玻璃化转变和结构相变发生在200 K左右。 (c)2006 Elsevier Ltd.保留所有权利。

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