Nonlocal self-organization of long stacking faults from highly strained nanocomposite film of complex oxide
Nonlocal self-organization of long stacking faults from highly strained nanocomposite film of complex oxide
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DOI：
10.1103/physrevmaterials.3.013403
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发表时间：
2019-01
影响因子：
3.4
通讯作者：
T. Horide;M. Ishimaru;Kazuhisa Sato;K. Matsumoto
中科院分区：
文献类型：
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作者：
T. Horide;M. Ishimaru;Kazuhisa Sato;K. Matsumoto
弹性应变和缺陷是控制fi激光显微系统结构和性能的重要关键字。虽然在传统的fiLMS中已经讨论了外延应变和错位错，但纳米复合应变和氧化物中复杂的缺陷可以显著地改变应变和缺陷的演化(fifi)。本研究采用YBa2Cu3O7-fi(δ)+BaMo3(M=Hf，Sn)的高应变纳米复合材料YBa2Cu3O7-YBCO(YBCO)+BaMO3(M=Hf，Sn)，通过异地热处理自组织形成了间距为5~30 nm、长度为~gt；500 nm的长层错。令人惊讶的是，尽管纳米复合材料界面存在局域构型，但观察到了层错的非局域性质，即>；500 nm以上的结构关联。在没有纳米棒的纯YBCOfilm中，即使在相同的热处理条件下，也没有观察到这种结构变化。应变能分析表明，层错的形成降低了纳米复合材料的应变，导致应变能最小。YBCO层错的层状结构和大的纳米复合应变实现了非局域自组织，这是传统的外延应变和错位错fit系统所没有的。能源部：
Elastic strain and defects are important key words for controlling structure and properties in films. While epitaxial strain and misfit dislocations have been discussed in conventional films, the evolution of strain and defect can be significantly varied by nanocomposite strain and complicated defects in oxides. In the present study, long stacking faults with a spacing of 5–30 nm and a length of > 500 nm were self-organized by ex situ annealing highly strained nanocomposite films of YBa 2 Cu 3 O 7– δ (YBCO) + BaMO 3 ( M = Hf , Sn). It is surprising that the nonlocal nature of stacking faults, namely, the structural correlation over > 500 nm, was observed in spite of the local configuration of the nanocomposite interface. This kind of structural variation was not observed in the pure YBCO film without nanorods, even when the same annealing was performed. A strain energy analysis showed that the stacking fault formation led to the strain energy minimum by reducing the nanocomposite strain. The layered structure of YBCO stacking faults and the large nanocomposite strain realized the present nonlocal self-organization, which is not observed in the conventional systems with epitaxial strain and misfit dislocations. DOI: