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首页> 外文期刊>Physica, B. Condensed Matter >Improved pinning properties in Y123 materials by chemical substitutions
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Improved pinning properties in Y123 materials by chemical substitutions

机译：通过化学取代改善Y123材料的钉扎性能

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We have investigated how T-c, J(c) and B-irr of compounds with double CuO2 planes depend on the physical properties and structural features of the blocking layer. By comparing J(c) and B-irr for several families of HTSC we have concluded that the intrinsic flux pinning is controlled to a large extent by the conductivity of the blocking layer. The width of the intermediate region between the blocks of the double CuO2 planes is less significant. To modify the conductivity of the CuO chains and decrease the anisotropy of the YBa2Cu3Oy compound, substitutions of transition elements for Cu and Sr for Ba were done resulting in enhanced pinning properties and increased T-c of YBaSrCu3-xMoxOy from 81 K for x = 0 to 86 K for x = 0.05-0.1. The pinning characteristics of substituted material were significantly modified most likely by a formation of dimers of corner shared MoO6 octahedra. The same structural modification was used to improve the pinning properties of the YBa2Cu3Oy compound. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 5]
机译：我们研究了具有双CuO2平面的化合物的T-c，J（c）和B-irr如何取决于阻挡层的物理性质和结构特征。通过比较几个HTSC系列的J（c）和B-irr，我们得出结论，固有磁通钉扎在很大程度上受阻挡层的电导率控制。双CuO 2平面的块之间的中间区域的宽度不太重要。为了修改CuO链的电导率并降低YBa2Cu3Oy化合物的各向异性，完成了用过渡元素替换Cu和Sr替换Ba的操作，从而增强了钉扎性能，并将YBaSrCu3-xMoxOy的Tc从81 K提升为x = 0至86 x的K ＝ 0.05-0.1。形成角共享的MoO6八面体的二聚体很可能会显着改变取代材料的固定特性。使用相同的结构修饰来改善YBa2Cu3Oy化合物的钉扎性能。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：5]

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