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首页> 外文会议>International symposium on superconductivity;ISS'98 >Magnetization and Entropy Changes at the First-Order Phase-Transition of Vortex-Lattice in (La_(1-x)Sr_x)_2CuO_4 Single Crystals
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Magnetization and Entropy Changes at the First-Order Phase-Transition of Vortex-Lattice in (La_(1-x)Sr_x)_2CuO_4 Single Crystals

机译：（La_（1-x）Sr_x）_2CuO_4单晶中涡旋晶格一阶相变的磁化和熵变

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摘要

The changes of the thermodynamic quantities (triangle openM_(pt) and triangle openS_(pt)) at the first-order transition (FOT) of vortex-lattice were examined in (La_(1-x)Sr_x)_2CuO_4 (La214) single crystals (0.046<=x<=0.077). Combining the data set reported for YBa_2Cu_3O_y (Y123) and Bi_2Sr_2CaCu_2O_y with the present results in La214, it was found that these characteristic quantities for all three systems, except for the temperature dependence of triangle openS_(pt) in Y123, showed quite similar behavior in the plots with normalized temperature scale by each T_c. This general trend in thermodynamic signature of the FOT suggested the common mechanism of the FOT in high-T_c superconductors.
机译：在（La_（1-x）Sr_x）_2CuO_4（La214）单晶中研究了涡旋晶格一阶跃迁（FOT）时热力学量的变化（三角形openM_（pt）和三角形openS_（pt））的变化。 （0.046 <= x <= 0.077）。将报告的YBa_2Cu_3O_y（Y123）和Bi_2Sr_2CaCu_2O_y的数据集与La214中的当前结果相结合，发现除了Y123中的三角形openS_（pt）的温度依赖性外，所有三个系统的这些特征量都表现出非常相似的行为。用每个T_c归一化的温度标度绘制的图。 FOT热力学特征的这一总体趋势表明，高T_c超导体中FOT的共同机制。

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