X射线衍射研究纳米棒在ZnMnGaO4薄膜中的棋盘式外延排列
Epitaxial checkerboard arrangement of nanorods in ZnMnGaO4 films studied by x-ray diffraction
摘要：
利用同步辐射X射线衍射研究了在MgO（001）衬底上外延生长的ZnMnGaO 4薄膜的纳米结构特性。ZnMnGaO 4薄膜由自组装棋盘（CB）结构组成，具有完美对齐和规则间隔的垂直纳米棒。CB结构的正交相和旋转四方相的晶格参数使用在尖晶石结构的各种对称和非对称反射周围测量的倒易空间图的H-K、H-L和K-L截面来分析。我们表明，在相边界的原子位移的对称性提供了两个域类型的膜的体积内的相干共存的手段。
英文摘要：
The intriguing nano-structural properties of a ZnMnGaO4 film epitaxially grown on MgO (001) substrate have been investigated using synchrotron radiation-based x-ray diffraction. The ZnMnGaO4 film consisted of a self-assembled checkerboard (CB) structure with perfectly aligned and regularly spaced vertical nanorods. The lattice parameters of the orthorhombic and rotated tetragonal phases of the CB structure were analyzed using H-K, H-L, and K-L cross sections of the reciprocal space maps measured around various symmetric and asymmetric reflections of the spinel structure. We demonstrate that the symmetry of atomic displacements at the phases boundaries provides the means for coherent coexistence of two domains types within the volume of the film.
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