Enhanced flux pinning properties of YBa2Cu3Oy by dilute impurity doping for CuO chain
Enhanced flux pinning properties of YBa2Cu3Oy by dilute impurity doping for CuO chain
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DOI：
10.1063/1.2387979
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发表时间：
2006-11
影响因子：
4
通讯作者：
Y. Ishii;J. Shimoyama;Y. Tazaki;T. Nakashima;S. Horii;K. Kishio
中科院分区：
文献类型：
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作者：
Y. Ishii;J. Shimoyama;Y. Tazaki;T. Nakashima;S. Horii;K. Kishio
采用单晶和熔融固化体研究了在Y123的CuO链中掺杂稀杂质对助熔剂钉接性能的影响。掺钴的Y123单晶和掺铁、钴或镓的Y123熔融固化体的Jc-H特性得到了显著改善，Jc-H曲线出现了巨大的二次峰。这些样品的现场Jc明显高于低锌掺杂体。这些结果强烈表明，通过稀杂质掺杂在CuO链中引入局部紊乱比在CuO2平面上掺杂杂质更有希望改善RE123材料的Jc。
Effects of dilute impurity doping to the CuO chain of Y123 on the flux pinning properties were studied using single crystals and melt-solidified bulks. Cobalt-doped Y123 single crystals and iron-, cobalt- or gallium-doped Y123 melt-solidified bulks exhibited dramatically improved Jc-H characteristics accompanying huge secondary peaks in Jc-H curves. In field Jc of these samples are apparently higher than that of a low level zinc-doped bulk. These results strongly suggest that introduction of local disorders in the CuO chain by dilute impurity doping is a more promising way to improve Jc of RE123 materials than impurity doping to the CuO2 plane.