Defect structure of ferromagnetic superconducting RuSr_{2}GdCu_{2}O_{8}
Defect structure of ferromagnetic superconducting RuSr_{2}GdCu_{2}O_{8}
复制标题
铁磁超导RuSr_{2}GdCu_{2}O_{8}的缺陷结构
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
A. Mclaughlin
中科院分区：
文献类型：
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作者：
O. Lebedev;G. Tendeloo;J. Attfield;A. Mclaughlin
用高分辨透射电子显微镜和高分辨扫描透射显微镜研究了超导铁磁块体RuSr_2GdCu_2O_8的结构和缺陷结构。两个不同的，但密切相关的结构，由于有序的旋转RuO 6八面体和由于铜取代的Ru-O层，已被揭示。Ru 1 − xSr 2GdCu 2 + xO 8 −的结构可以描述为CuO 4面和RuO 6八面体沿c轴沿着的周期性变化。该阶段的晶胞参数为2ap 2ap 2c。讨论了该相和缺陷结构对超导性和磁性能灵敏度的可能影响。分析了90°畴界、130 °反相畴界和位错等局部缺陷。
The structure and defect structure of superconducting ferromagnetic bulk RuSr2GdCu2O8 has been investigated using high-resolution transmission electron microscopy and high-resolution scanning transmission microscopy. Two distinct, but closely related structures, due to ordering of rotated RuO6 octahedra and due to Cu substitution in the Ru-O layer, have been revealed. The structure of Ru1−xSr2GdCu2+xO8− can be described as a periodic alteration along the c axis of CuO4 planes and RuO6 octahedra. The unit-cell parameters of this phase are 2ap 2ap 2c. The possible influence of this phase and defect structure on the sensitivity of the superconductivity and magnetic properties is discussed. Local defects such as 90° domain boundaries, 130 antiphase boundaries, and the associated dislocations are analyzed.