Field–Temperature Phase Diagram of Intergrain Ordering in Superconducting Ceramic YBCO
Field–Temperature Phase Diagram of Intergrain Ordering in Superconducting Ceramic YBCO
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超导陶瓷 YBCO 中晶粒间有序化的场-温相图
DOI：
10.1088/1742-6596/871/1/012011
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
K. Koyama
中科院分区：
文献类型：
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作者：
H. Deguchi;R. Warabino;S. Ka;M. Mito;M. Hagiwara;K. Koyama
由亚微米颗粒组成的YBa2Cu4O8陶瓷超导体被认为是一个随机的约瑟夫森耦合网络，包含所谓的π结，并显示出连续的相变。随着温度的降低，晶内超导转变首先在Tc1处发生，然后在Tc2处发生手性玻璃化转变。Tc3(<；Tc2)处的第三个转变是晶间超导转变。我们测量了YBa2Cu4O8陶瓷超导体的非线性磁化率和电阻率，以确定其转变温度Tc2和Tc3的场依赖关系。根据Kawamura的预测结果，讨论了晶间有序化的相图。
The ceramic YBa2Cu4O8 superconductor composed of submicron grains is considered a random Josephson-coupled network containing the so-called π junctions and shows successive phase transitions. With decreasing temperature, first the intragrain superconductive transition occurs inside each grain at Tc1 and then the chiral-glass transition occurs among the grains at Tc2 (< Tc1). The third transition at Tc3 (< Tc2) is the intergrain superconducting transition. We measured the nonlinear susceptibility and resistivity of the ceramic YBa2Cu4O8 superconductor to determine the field dependences of the transition temperatures Tc2 and Tc3. The phase diagram of the intergrain ordering is discussed in light of the result predicted by Kawamura.
陶瓷 YBCO 超导体中记忆效应对停止温度和探测场的依赖性
DOI：
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发表时间：
2013
期刊：
Physics Procedia
影响因子：
--
作者：
H. Deguchi;M. Syudo;T. Ashida;Y. Sasaki;M. Mito;S. Takagi;M. Hagiwara;K. Koyama
通讯作者：
K. Koyama