Orientation Control in Self-Assemble Perovskite-Spinel Hetero-eptaxial Nanostructures

• Main Author: 蔡佩砡
• Other Authors: 朱英豪
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/69964653464852867001

碩士 === 國立交通大學 === 材料科學與工程學系 === 99 === In this study, advanced control of crystallographic orientations and magnetic properties of self-assembled nanostructures via rational selections of substrates are 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 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 over material functionality such as the magnetic anisotropy of CoFe2O4. This study opens a new pathway for engineering of self-assembled hetero-epitaxial nanostructures.