Misorientation Control and Functionality Design of Nanopillars in Self-Assembled Perovskite−Spinel Heteroepitaxial Nanostructures

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• 作者：Sheng-Chieh Liao ; Pei-Yu Tsai ; Chen-Wei Liang ; Heng-Jui Liu ; Jan-Chi Yang ; Su-Jien Lin ; Chih-Huang Lai ; Ying-Hao Chu
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：May 24, 2011
• 年：2011
• 卷：5
• 期：5
• 页码：4118-4122
• 全文大小：830K
• 年卷期：0
• ISSN：1936-086X

文摘

In this study, advanced control of crystallographic orientations and magnetic properties of self-assembled nanostructures via rational selections of substrates is demonstrated. We show that in the perovskite−spinel BiFeO₃−CoFe₂O₄ model system the crystal orientation of self-assembled CoFe₂O₄ nanopillars can be tuned among (001), (011), and (111), while that of the BiFeO₃ matrix is fixed in (001). Moreover, the resultant CoFe₂O₄ nanopillars appear in various shapes: pyramid, roof, and triangular platform, respectively. The tunable nanostructures through this approach enable the control of material functionality such as the magnetic anisotropy of CoFe₂O₄. This study opens a new pathway for the engineering of self-assembled heteroepitaxial nanostructures.