Anomalous AC Susceptibility Response of (Cu,C)Ba2Ca2Cu3Oy: Experimental Indication of Two-Component Vortex Matter in Multi-Layered Cuprate Superconductors
Anomalous AC Susceptibility Response of (Cu,C)Ba2Ca2Cu3Oy: Experimental Indication of Two-Component Vortex Matter in Multi-Layered Cuprate Superconductors
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DOI：
10.1143/jjap.46.l451
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发表时间：
2007
影响因子：
1.5
通讯作者：
A. Crisan;Y. Tanaka;D. Shivagan;A. Iyo;L. Coşereanu;K. Tokiwa;Tsuneo Watanabe
中科院分区：
文献类型：
--
作者：
A. Crisan;Y. Tanaka;D. Shivagan;A. Iyo;L. Coşereanu;K. Tokiwa;Tsuneo Watanabe
我们已经测量了（Cu，C）Ba_2Ca_2Cu_3O_y与对齐的微晶在现场冷却条件下的交流磁化率响应。在一定但较大的外加直流磁场范围内，异相磁化率有两个耗散峰。由于样品的特性、第二峰的形状及其位置的场依赖性，我们排除了反常第二耗散峰与晶间耗散有关的可能性。由于这种多层铜氧化物是已知的是一个两个间隙超导体，我们相信，我们的结果是一个实验指示的双组分涡旋物质在高临界温度超导体。
We have measured the AC susceptibility response in field-cooling conditions of (Cu,C)Ba2Ca2Cu3Oy with aligned crystallites. In a certain but large range of the applied DC magnetic field, the out-of-phase susceptibility has two dissipation peaks. Due to the characteristics of the sample, the shape of the second peak and its position's field-dependence, we ruled out the possibility that the anomalous second dissipation peak could be related to intergrain dissipation. Because this multilayered cuprate is known to be a two-gap superconductor, we believe that our results are an experimental indication of a two-component vortex matter in high-critical temperature superconductors.